Changelog

2026-03-02

WAF Release - 2026-03-02

This week's release introduces new detections for vulnerabilities in SmarterTools SmarterMail (CVE-2025-52691 and CVE-2026-23760), alongside improvements to an existing Command Injection (nslookup) detection to enhance coverage.

Key Findings

CVE-2025-52691: SmarterTools SmarterMail mail server is vulnerable to Arbitrary File Upload, allowing an unauthenticated attacker to upload files to any location on the mail server, potentially enabling remote code execution.
CVE-2026-23760: SmarterTools SmarterMail versions prior to build 9511 contain an authentication bypass vulnerability in the password reset API permitting unaunthenticated to reset system administrator accounts failing to verify existing password or reset token.

Impact

Successful exploitation of these SmarterMail vulnerabilities could lead to full system compromise or unauthorized administrative access to mail servers. Administrators are strongly encouraged to apply vendor patches without delay.

Ruleset	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset	N/A	SmarterMail - Arbitrary File Upload - CVE-2025-52691	Log	Block	This is a new detection.
Cloudflare Managed Ruleset	N/A	SmarterMail - Authentication Bypass - CVE-2026-23760	Log	Block	This is a new detection.
Cloudflare Managed Ruleset	N/A	Command Injection - Nslookup - Beta	Log	Block	This rule is merged into the original rule "Command Injection - Nslookup" (ID: )

2026-02-16

WAF Release - 2026-02-16

This week’s release introduces new detections for CVE-2025-68645 and CVE-2025-31125.

Key Findings

CVE-2025-68645: A Local File Inclusion (LFI) vulnerability in the Webmail Classic UI of Zimbra Collaboration Suite (ZCS) 10.0 and 10.1 allows unauthenticated remote attackers to craft requests to the /h/rest endpoint, improperly influence internal dispatching, and include arbitrary files from the WebRoot directory.
CVE-2025-31125: Vite, the JavaScript frontend tooling framework, exposes content of non-allowed files via ?inline&import when its development server is network-exposed, enabling unauthorized attackers to read arbitrary files and potentially leak sensitive information.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	Zimbra - Local File Inclusion - CVE:CVE-2025-68645	Log	Block	This is a new detection.
Cloudflare Managed Ruleset		N/A	Vite - WASM Import Path Traversal - CVE:CVE-2025-31125	Log	Block	This is a new detection.

2026-02-10

WAF Release - 2026-02-10

This week’s release changes the rule action from BLOCK to Disabled for Anomaly:Header:User-Agent - Fake Google Bot.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	Anomaly:Header:User-Agent - Fake Google Bot	Enabled	Disabled	We are changing the action for this rule from BLOCK to Disabled

2026-02-02

WAF Release - 2026-02-02

This week’s release introduces new detections for CVE-2025-64459 and CVE-2025-24893.

Key Findings

CVE-2025-64459: Django versions prior to 5.1.14, 5.2.8, and 4.2.26 are vulnerable to SQL injection via crafted dictionaries passed to QuerySet methods and the Q() class.
CVE-2025-24893: XWiki allows unauthenticated remote code execution through crafted requests to the SolrSearch endpoint, affecting the entire installation.

Ruleset	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset	N/A	XWiki - Remote Code Execution - CVE:CVE-2025-24893 2	Log	Block	This is a new detection.
Cloudflare Managed Ruleset	N/A	Django SQLI - CVE:CVE-2025-64459	Log	Block	This is a new detection.
Cloudflare Managed Ruleset	N/A	NoSQL, MongoDB - SQLi - Comparison - 2	Block	Block	Rule metadata description refined. Detection unchanged.

2026-01-26

WAF Release - 2026-01-26

This week’s release introduces new detections for denial-of-service attempts targeting React CVE-2026-23864 (https://www.cve.org/CVERecord?id=CVE-2026-23864 ↗).

Key Findings

CVE-2026-23864 (https://www.cve.org/CVERecord?id=CVE-2026-23864 ↗) affects react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack packages.
Attackers can send crafted HTTP requests to Server Function endpoints, causing server crashes, out-of-memory exceptions, or excessive CPU usage.

Ruleset	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset	N/A	React Server - DOS - CVE:CVE-2026-23864 - 1	N/A	Block	This is a new detection.
Cloudflare Managed Ruleset	N/A	React Server - DOS - CVE:CVE-2026-23864 - 2	N/A	Block	This is a new detection.
Cloudflare Managed Ruleset	N/A	React Server - DOS - CVE:CVE-2026-23864 - 3	N/A	Block	This is a new detection.

2026-01-20

WAF Release - 2026-01-20

This week's release focuses on improvements to existing detections to enhance coverage.

Key Findings

Existing rule enhancements have been deployed to improve detection resilience against SQL injection.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	SQLi - Comment - Beta	Log	Block	This rule is merged into the original rule "SQLi - Comment" (ID: )
Cloudflare Managed Ruleset		N/A	SQLi - Comparison - Beta	Log	Block	This rule is merged into the original rule "SQLi - Comparison" (ID: )

2026-01-15

WAF Release - 2026-01-15

This week's release focuses on improvements to existing detections to enhance coverage.

Key Findings

Existing rule enhancements have been deployed to improve detection resilience against SQL Injection.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	SQLi - String Function - Beta	Log	Block	This rule is merged into the original rule "SQLi - String Function" (ID: )
Cloudflare Managed Ruleset		N/A	SQLi - Sub Query - Beta	Log	Block	This rule is merged into the original rule "SQLi - Sub Query" (ID: )

2026-01-12

WAF Release - 2026-01-12

This week's release focuses on improvements to existing detections to enhance coverage.

Key Findings

Existing rule enhancements have been deployed to improve detection resilience against SQL Injection.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	SQLi - AND/OR MAKE_SET/ELT - Beta	Log	Block	This rule is merged into the original rule "SQLi - AND/OR MAKE_SET/ELT" (ID: )
Cloudflare Managed Ruleset		N/A	SQLi - Benchmark Function - Beta	Log	Block	This rule is merged into the original rule "SQLi - Benchmark Function" (ID: )

2025-12-18

WAF Release - 2025-12-18

This week's release focuses on improvements to existing detections to enhance coverage.

Key Findings

Existing rule enhancements have been deployed to improve detection resilience against broad classes of web attacks and strengthen behavioral coverage.

Ruleset	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset	N/A	Atlassian Confluence - Code Injection - CVE:CVE-2021-26084 - Beta	Log	Block	This rule is merged into the original rule "Atlassian Confluence - Code Injection - CVE:CVE-2021-26084" (ID: )
Cloudflare Managed Ruleset	N/A	PostgreSQL - SQLi - Copy - Beta	Log	Block	This rule is merged into the original rule "PostgreSQL - SQLi - COPY" (ID: )
Cloudflare Managed Ruleset	N/A	Generic Rules - Command Execution - Body	Log	Disabled	This is a new detection.
Cloudflare Managed Ruleset	N/A	Generic Rules - Command Execution - Header	Log	Disabled	This is a new detection.
Cloudflare Managed Ruleset	N/A	Generic Rules - Command Execution - URI	Log	Disabled	This is a new detection.
Cloudflare Managed Ruleset	N/A	SQLi - Tautology - URI - Beta	Log	Block	This rule is merged into the original rule "SQLi - Tautology - URI" (ID: )
Cloudflare Managed Ruleset	N/A	SQLi - WaitFor Function - Beta	Log	Block	This rule is merged into the original rule "SQLi - WaitFor Function" (ID: )
Cloudflare Managed Ruleset	N/A	SQLi - AND/OR Digit Operator Digit 2 - Beta	Log	Block	This rule is merged into the original rule "SQLi - AND/OR Digit Operator Digit" (ID: )
Cloudflare Managed Ruleset	N/A	SQLi - Equation 2 - Beta	Log	Block	This rule is merged into the original rule "SQLi - Equation" (ID: )

2025-12-11

WAF Release - 2025-12-11 - Emergency

This emergency release introduces rules for CVE-2025-55183 and CVE-2025-55184, targeting server-side function exposure and resource-exhaustion patterns, respectively.

Key Findings

Added coverage for Leaking Server Functions (CVE-2025-55183) and React Function DoS detection (CVE-2025-55184).

Impact

These updates strengthen protection for server-function abuse techniques (CVE-2025-55183, CVE-2025-55184) that may expose internal logic or disrupt application availability.

Ruleset	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset	N/A	React - Leaking Server Functions - CVE:CVE-2025-55183	N/A	Block	This was labeled as Generic - Server Function Source Code Exposure.
Cloudflare Free Ruleset	N/A	React - Leaking Server Functions - CVE:CVE-2025-55183	N/A	Block	This was labeled as Generic - Server Function Source Code Exposure.
Cloudflare Managed Ruleset	N/A	React - DoS - CVE:CVE-2025-55184	N/A	Disabled	This was labeled as Generic – Server Function Resource Exhaustion.

2025-12-10

WAF Release - 2025-12-10 - Emergency

This additional week's emergency release introduces improvements to our existing rule for React – Remote Code Execution – CVE-2025-55182 - 2, along with two new generic detections covering server-side function exposure and resource-exhaustion patterns.

Key Findings

Enhanced detection logic for React – RCE – CVE-2025-55182, added Generic – Server Function Source Code Exposure, and added Generic – Server Function Resource Exhaustion.

Impact

These updates strengthen protection against React RCE exploitation attempts and broaden coverage for common server-function abuse techniques that may expose internal logic or disrupt application availability.

Ruleset	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset	N/A	React - Remote Code Execution - CVE:CVE-2025-55182 - 2	N/A	Block	This is an improved detection.
Cloudflare Free Ruleset	N/A	React - Remote Code Execution - CVE:CVE-2025-55182 - 2	N/A	Block	This is an improved detection.
Cloudflare Managed Ruleset	N/A	Generic - Server Function Source Code Exposure	N/A	Block	This is a new detection.
Cloudflare Free Ruleset	N/A	Generic - Server Function Source Code Exposure	N/A	Block	This is a new detection.
Cloudflare Managed Ruleset	N/A	Generic - Server Function Resource Exhaustion	N/A	Disabled	This is a new detection.

2025-12-05

Increased WAF payload limit for all plans

Cloudflare WAF now inspects request-payload size of up to 1 MB across all plans to enhance our detection capabilities for React RCE (CVE-2025-55182).

Key Findings

React payloads commonly have a default maximum size of 1 MB. Cloudflare WAF previously inspected up to 128 KB on Enterprise plans, with even lower limits on other plans.

Update: We later reinstated the maximum request-payload size the Cloudflare WAF inspects. Refer to Updating the WAF maximum payload values for details.

2025-12-05

Updating the WAF maximum payload values

We are reinstating the maximum request-payload size the Cloudflare WAF inspects, with WAF on Enterprise zones inspecting up to 128 KB.

Key Findings

On December 5, 2025, we initially attempted to increase the maximum WAF payload limit to 1 MB across all plans. However, an automatic rollout for all customers proved impractical because the increase led to a surge in false positives for existing managed rules.

This issue was particularly notable within the Cloudflare Managed Ruleset and the Cloudflare OWASP Core Ruleset, impacting customer traffic.

Impact

Customers on paid plans can increase the limit to 1 MB for any of their zones by contacting Cloudflare Support. Free zones are already protected up to 1 MB and do not require any action.

2025-12-03

WAF Release - 2025-12-03 - Emergency

The WAF rule deployed yesterday to block unsafe deserialization-based RCE has been updated. The rule description now reads “React – RCE – CVE-2025-55182”, explicitly mapping to the recently disclosed React Server Components vulnerability. Detection logic remains unchanged.

Key Findings

Rule description updated to reference React – RCE – CVE-2025-55182 while retaining existing unsafe-deserialization detection.

Impact

Improved classification and traceability with no change to coverage against remote code execution attempts.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	React - RCE - CVE:CVE-2025-55182	N/A	Block	Rule metadata description changed. Detection unchanged.
Cloudflare Free Ruleset		N/A	React - RCE - CVE:CVE-2025-55182	N/A	Block	Rule metadata description changed. Detection unchanged.

2025-12-02

WAF Release - 2025-12-02 - Emergency

This week's emergency release introduces a new rule to block a critical RCE vulnerability in widely-used web frameworks through unsafe deserialization patterns.

Key Findings

New WAF rule deployed for RCE Generic Framework to block malicious POST requests containing unsafe deserialization patterns. If successfully exploited, this vulnerability allows attackers with network access via HTTP to execute arbitrary code remotely.

Impact

Successful exploitation allows unauthenticated attackers to execute arbitrary code remotely through crafted serialization payloads, enabling complete system compromise, data exfiltration, and potential lateral movement within affected environments.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	RCE Generic - Framework	N/A	Block	This is a new detection.
Cloudflare Free Ruleset		N/A	RCE Generic - Framework	N/A	Block	This is a new detection.

2025-12-01

WAF Release - 2025-12-01

This week’s release introduces new detections for remote code execution attempts targeting Monsta FTP (CVE-2025-34299), alongside improvements to an existing XSS detection to enhance coverage.

Key Findings

CVE-2025-34299 is a critical remote code execution flaw in Monsta FTP, arising from improper handling of user-supplied parameters within the file-handling interface. Certain builds allow crafted requests to bypass sanitization and reach backend PHP functions that execute arbitrary commands. Attackers can send manipulated parameters through the web panel to trigger command execution within the application’s runtime environment.

Impact

If exploited, the vulnerability enables full remote command execution on the underlying server, allowing takeover of the hosting environment, unauthorized file access, and potential lateral movement. As the flaw can be triggered without authentication on exposed Monsta FTP instances, it represents a severe risk for publicly reachable deployments.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	Monsta FTP - Remote Code Execution - CVE:CVE-2025-34299	Log	Block	This is a new detection
Cloudflare Managed Ruleset		N/A	XSS - JS Context Escape - Beta	Log	Block	This rule is merged into the original rule "XSS - JS Context Escape" (ID: )

2025-11-24

WAF Release - 2025-11-24

This week highlights enhancements to detection signatures improving coverage for vulnerabilities in FortiWeb, linked to CVE-2025-64446, alongside new detection logic expanding protection against PHP Wrapper Injection techniques.

Key Findings

This vulnerability enables an unauthenticated attacker to bypass access controls by abusing the CGIINFO header. The latest update strengthens detection logic to ensure a reliable identification of crafted requests attempting to exploit this flaw.

Impact

FortiWeb (CVE-2025-64446): Exploitation allows a remote unauthenticated adversary to circumvent authentication mechanisms by sending a manipulated CGIINFO header to FortiWeb’s backend CGI handler. Successful exploitation grants unintended access to restricted administrative functionality, potentially enabling configuration tampering or system-level actions.

Ruleset	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset	N/A	FortiWeb - Authentication Bypass via CGIINFO Header - CVE:CVE-2025-64446	Log	Block	This is a new detection
Cloudflare Managed Ruleset	N/A	PHP Wrapper Injection - Body - Beta	Log	Disabled	This rule has been merged into the original rule "PHP Wrapper Injection - Body" (ID: )
Cloudflare Managed Ruleset	N/A	PHP Wrapper Injection - URI - Beta	Log	Disabled	This rule has been merged into the original rule "PHP Wrapper Injection - URI" (ID: )

2025-11-21

WAF Release - 2025-11-21

This week’s release introduces a critical detection for CVE-2025-61757, a vulnerability in the Oracle Identity Manager REST WebServices component.

Key Findings

This flaw allows unauthenticated attackers with network access over HTTP to fully compromise the Identity Manager, potentially leading to a complete takeover.

Impact

Oracle Identity Manager (CVE-2025-61757): Exploitation could allow an unauthenticated remote attacker to bypass security checks by sending specially crafted requests to the application's message processor. This enables the creation of arbitrary employee accounts, which can be leveraged to modify system configurations and achieve full system compromise.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	Oracle Identity Manager - Pre-Auth RCE - CVE:CVE-2025-61757	N/A	Block	This is a new detection.

2025-11-17

WAF Release - 2025-11-17

This week highlights enhancements to detection signatures improving coverage for vulnerabilities in DELMIA Apriso, linked to CVE-2025-6205.

Key Findings

This vulnerability allows unauthenticated attackers to gain privileged access to the application. The latest update provides enhanced detection logic for resilient protection against exploitation attempts.

Impact

DELMIA Apriso (CVE-2025-6205): Exploitation could allow an unauthenticated remote attacker to bypass security checks by sending specially crafted requests to the application's message processor. This enables the creation of arbitrary employee accounts, which can be leveraged to modify system configurations and achieve full system compromise.

Ruleset	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset	N/A	DELMIA Apriso - Auth Bypass - CVE:CVE-2025-6205	Log	Block	This is a new detection.
Cloudflare Managed Ruleset	N/A	PHP Wrapper Injection - Body	N/A	Disabled	Rule metadata description refined. Detection unchanged.
Cloudflare Managed Ruleset	N/A	PHP Wrapper Injection - URI	N/A	Disabled	Rule metadata description refined. Detection unchanged.

2025-11-10

WAF Release - 2025-11-10

This week’s release introduces new detections for Prototype Pollution across three common vectors: URI, Body, and Header/Form.

Key Findings

These attacks can affect both API and web applications by altering normal behavior or bypassing security controls.

Impact

Exploitation may allow attackers to change internal logic or cause unexpected behavior in applications using JavaScript or Node.js frameworks. Developers should sanitize input keys and avoid merging untrusted data structures.

Ruleset	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset	N/A	Generic Rules - Prototype Pollution - URI	Log	Disabled	This is a new detection
Cloudflare Managed Ruleset	N/A	Generic Rules - Prototype Pollution - Body	Log	Disabled	This is a new detection
Cloudflare Managed Ruleset	N/A	Generic Rules - Prototype Pollution - Header - Form	Log	Disabled	This is a new detection

2025-11-05

WAF Release - 2025-11-05 - Emergency

This week’s emergency release introduces a new detection signature that enhances coverage for a critical vulnerability in the React Native Metro Development Server, tracked as CVE-2025-11953.

Key Findings

The Metro Development Server exposes an HTTP endpoint that is vulnerable to OS command injection (CWE-78). An unauthenticated network attacker can send a crafted request to this endpoint and execute arbitrary commands on the host running Metro. The vulnerability affects Metro/cli-server-api builds used by React Native Community CLI in pre-patch development releases.

Impact

Successful exploitation of CVE-2025-11953 may result in remote command execution on developer workstations or CI/build agents, leading to credential and secret exposure, source tampering, and potential lateral movement into internal networks. Administrators and developers are strongly advised to apply the vendor's patches and restrict Metro’s network exposure to reduce this risk.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	React Native Metro - Command Injection - CVE:CVE-2025-11953	N/A	Block	This is a New Detection

2025-11-03

WAF Release - 2025-11-03

This week highlights enhancements to detection signatures improving coverage for vulnerabilities in Adobe Commerce and Magento Open Source, linked to CVE-2025-54236.

Key Findings

This vulnerability allows unauthenticated attackers to take over customer accounts through the Commerce REST API and, in certain configurations, may lead to remote code execution. The latest update provides enhanced detection logic for resilient protection against exploitation attempts.

Impact

Adobe Commerce (CVE-2025-54236): Exploitation may allow attackers to hijack sessions, execute arbitrary commands, steal data, and disrupt storefronts, resulting in confidentiality and integrity risks for merchants. Administrators are strongly encouraged to apply vendor patches without delay.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		100774C	Adobe Commerce - Remote Code Execution - CVE:CVE-2025-54236	Log	Block	This is an improved detection.

2025-10-30

WAF Release - 2025-10-30 - Emergency

This week’s release introduces a new detection signature that enhances coverage for a critical vulnerability in Oracle E-Business Suite, tracked as CVE-2025-61884.

Key Findings

The flaw is easily exploitable and allows an unauthenticated attacker with network access to compromise Oracle Configurator, which can grant access to sensitive resources and configuration data. The affected versions include 12.2.3 through 12.2.14.

Impact

Successful exploitation of CVE-2025-61884 may result in unauthorized access to critical business data or full exposure of information accessible through Oracle Configurator. Administrators are strongly advised to apply vendor's patches and recommended mitigations to reduce this exposure.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	Oracle E-Business Suite - SSRF - CVE:CVE-2025-61884	N/A	Block	This is a New Detection

2025-10-24

WAF Release - 2025-10-24 - Emergency

This week’s release introduces a new detection signature that enhances coverage for a critical vulnerability in Windows Server Update Services (WSUS), tracked as CVE-2025-59287.

Key Findings

The vulnerability allows unauthenticated attackers to potentially achieve remote code execution. The updated detection logic strengthens defenses by improving resilience against exploitation attempts targeting this flaw.

Impact

Successful exploitation of CVE-2025-59287 could enable attackers to hijack sessions, execute arbitrary commands, exfiltrate sensitive data, and disrupt storefront operations. These actions pose significant confidentiality and integrity risks to affected environments. Administrators should apply vendor patches immediately to mitigate exposure.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	Windows Server - Deserialization - CVE:CVE-2025-59287	N/A	Block	This is a New Detection

2025-10-23

WAF Release - 2025-10-23 - Emergency

This week highlights enhancements to detection signatures improving coverage for vulnerabilities in Adobe Commerce and Magento Open Source, linked to CVE-2025-54236.

Key Findings

This vulnerability allows unauthenticated attackers to take over customer accounts through the Commerce REST API and, in certain configurations, may lead to remote code execution. The latest update enhances detection logic to provide more resilient protection against exploitation attempts.

Impact

Adobe Commerce (CVE-2025-54236): Exploitation may allow attackers to hijack sessions, execute arbitrary commands, steal data, and disrupt storefronts, resulting in confidentiality and integrity risks for merchants. Administrators are strongly encouraged to apply vendor patches without delay.

Ruleset	Rule ID	Legacy Rule ID	Description	Previous Action	New Action	Comments
Cloudflare Managed Ruleset		N/A	Adobe Commerce - Remote Code Execution - CVE:CVE-2025-54236	N/A	Block	This is a New Detection