---
description: Cloudflare WAF managed rulesets 2026-09-22 release
title: WAF Release - 2026-09-22
image: https://developers.cloudflare.com/changelog/post/2026-09-22-waf-release/og.png?v=15c0ec992ca3e37e
---

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September 22, 2026

## WAF Release - 2026-09-22

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

Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/changelog/post/2026-09-22-waf-release/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/)

This release introduces new threat detections to enhance protection against Server-Side Request Forgery (SSRF) attempts using non-standard IP notations or jar loopback payloads, alongside new defenses against Server-Side Template Injection (SSTI) targeting Jinja environments.

| Ruleset | Rule ID | Legacy Rule ID | Description | Previous Action | New Action | Comments |
| --- | --- | --- | --- | --- | --- | --- |
| Cloudflare Managed Ruleset | ...5f21b651 | N/A | SSRF - Cloud,Link-Local non-standard IP notation | Log | Block | This is a new detection. |
| Cloudflare Managed Ruleset | ...0f0313d6 | N/A | SSRF - Block jar HTTP loopback payload | Log | Block | This is a new detection. |
| Cloudflare Managed Ruleset | ...75cd912a | N/A | SSRF - Local non-standard IP notation | Log | Block | This is a new detection. |
| Cloudflare Managed Ruleset | ...a1ba83f6 | N/A | SSTI - Jinja Dangerous Globals Chain | Log | Block | This is a new detection. |

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