---
title: WAF Release - 2025-12-10 - Emergency
description: Cloudflare WAF managed rulesets 2025-12-10 emergency release
image: https://developers.cloudflare.com/changelog-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/changelog/llms.txt  
> Use this file to discover all available pages before exploring further. 

[Skip to content](#%5Ftop) 

# Changelog

New updates and improvements at Cloudflare.

[ Subscribe to RSS ](https://developers.cloudflare.com/changelog/rss/index.xml) [ View RSS feeds ](https://developers.cloudflare.com/fundamentals/new-features/available-rss-feeds/) 

![hero image](https://developers.cloudflare.com/_astro/hero.CVYJHPAd_26AMqX.svg) 

[ ← Back to all posts ](https://developers.cloudflare.com/changelog/) 

## WAF Release - 2025-12-10 - Emergency

Dec 10, 2025 

[ WAF ](https://developers.cloudflare.com/waf/) 

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                    | Rule ID     | Legacy Rule ID | Description                                            | Previous Action | New Action | Comments                       |
| -------------------------- | ----------- | -------------- | ------------------------------------------------------ | --------------- | ---------- | ------------------------------ |
| Cloudflare Managed Ruleset | ...15fce168 | N/A            | React - Remote Code Execution - CVE:CVE-2025-55182 - 2 | N/A             | Block      | This is an improved detection. |
| Cloudflare Free Ruleset    | ...74746aff | N/A            | React - Remote Code Execution - CVE:CVE-2025-55182 - 2 | N/A             | Block      | This is an improved detection. |
| Cloudflare Managed Ruleset | ...fefb4e9b | N/A            | Generic - Server Function Source Code Exposure         | N/A             | Block      | This is a new detection.       |
| Cloudflare Free Ruleset    | ...251e86aa | N/A            | Generic - Server Function Source Code Exposure         | N/A             | Block      | This is a new detection.       |
| Cloudflare Managed Ruleset | ...102ec699 | N/A            | Generic - Server Function Resource Exhaustion          | N/A             | Disabled   | This is a new detection.       |

```json
{"@context":"https://schema.org","@type":"BlogPosting","@id":"https://developers.cloudflare.com/changelog/post/2025-12-10-emergency-waf-release/#page","headline":"WAF Release - 2025-12-10 - Emergency · Changelog","description":"Cloudflare WAF managed rulesets 2025-12-10 emergency release","url":"https://developers.cloudflare.com/changelog/post/2025-12-10-emergency-waf-release/","inLanguage":"en","image":"https://developers.cloudflare.com/changelog-preview.png","dateModified":"2025-12-10","datePublished":"2025-12-10","publisher":{"@type":"Organization","name":"Cloudflare","url":"https://www.cloudflare.com/"},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}
```