---
title: WAF Release - 2025-08-29 - Emergency
description: Cloudflare WAF managed rulesets 2025-08-29 emergency release
image: https://developers.cloudflare.com/changelog-preview.png
---

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## WAF Release - 2025-08-29 - Emergency

Aug 29, 2025 

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

**This week's update**

This week, new critical vulnerabilities were disclosed in Next.js’s image optimization functionality, exposing a broad range of production environments to risks of data exposure and cache manipulation.

**Key Findings**

* CVE-2025-55173: Arbitrary file download from the server via image optimization.
* CVE-2025-57752: Cache poisoning leading to unauthorized data disclosure.

**Impact**

Exploitation could expose sensitive files, leak user or backend data, and undermine application trust. Given Next.js’s wide use, immediate patching and cache hardening are strongly advised.

| Ruleset                    | Rule ID     | Legacy Rule ID | Description                                            | Previous Action | New Action | Comments                |
| -------------------------- | ----------- | -------------- | ------------------------------------------------------ | --------------- | ---------- | ----------------------- |
| Cloudflare Managed Ruleset | ...9ff4bfe3 | 100613         | Next.js - Dangerous File Download - CVE:CVE-2025-55173 | N/A             | Block      | This is a new detection |
| Cloudflare Managed Ruleset | ...69b9ea7d | 100616         | Next.js - Information Disclosure - CVE:CVE-2025-57752  | N/A             | Block      | This is a new detection |

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