CVE-2026-107835
OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. Prior to 3.8.1, internal/cookies.ParseCookies in internal/cookies/cookies.go handles boundary ASCII control characters and control-only or empty cookie names differently from several backend cookie parsers. An unauthenticated attacker can craft a Cookie header so Coraza indexes or drops a cookie under a different name or value from the backend application, causing rules targeting REQUEST_COOKIES or REQUEST_COOKIES_NAMES to miss application-visible attacker data. Exploitation depends on the backend parser and affected rule scope, and interior control characters with inconsistent backend behavior are outside this advisory's remediation. This issue is fixed in version 3.8.1.
- CVSS 3.1
- 4.0
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-25)
- CWE
- CWE-436
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-g4qm-m288-5cp9 | Go | github.com/corazawaf/coraza/v3 | <3.8.1 | 3.8.1 |
| GO-2026-6694 | Go | github.com/corazawaf/coraza | all versions | no fix published |
| GO-2026-6694 | Go | github.com/corazawaf/coraza/v2 | all versions | no fix published |
| GO-2026-6694 | Go | github.com/corazawaf/coraza/v3 | <3.8.1 | 3.8.1 |
References
- https://github.com/corazawaf/coraza/commit/0b940e197ad9983fb3aa36e84f1f81ff985461af
- https://github.com/corazawaf/coraza/commit/9f8521398d1ff023b958fad0b944cac265763866
- https://github.com/corazawaf/coraza/releases/tag/v3.8.1
- https://github.com/corazawaf/coraza/security/advisories/GHSA-g4qm-m288-5cp9
- https://github.com/corazawaf/coraza/security/advisories/GHSA-g4qm-m288-5cp9