---
description: Cloudflare WAF managed rulesets 2025-12-10 emergency release
title: WAF Release - 2025-12-10 - Emergency
image: https://developers.cloudflare.com/changelog/post/2025-12-10-emergency-waf-release/og.png?v=4931ced6b89fd431
---

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December 10, 2025

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

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

Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/changelog/post/2025-12-10-emergency-waf-release/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/)

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. |

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