---
title: WAF Release - 2025-08-29 - Emergency · Changelog
description: Cloudflare WAF managed rulesets 2025-08-29 emergency release
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---

# Changelog

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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 | ea55f8aac44246cc9b827eea9ff4bfe3 | 100613 | Next.js - Dangerous File Download - CVE:CVE-2025-55173 | N/A | Block | This is a new detection |
| Cloudflare Managed Ruleset | e2b2d77a79cc4a76bf7ba53d69b9ea7d | 100616 | Next.js - Information Disclosure - CVE:CVE-2025-57752 | N/A | Block | This is a new detection |
