CVE-2026-107835OWASP Coraza WAF: Cookie Parser Confusion
Updated under an hour ago ()
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It affects corazawaf coraza. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 4.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
- Weakness (CWE)
- CWE-436
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
corazawaf coraza corazawaf:coraza (from the name) | before 3.8.1 | CNA record |
References
- https://github.com/corazawaf/coraza/security/advisories/GHSA-g4qm-m288-5cp9x-refsource-confirm
- https://github.com/corazawaf/coraza/commit/0b940e197ad9983fb3aa36e84f1f81ff985461afx-refsource-misc
- https://github.com/corazawaf/coraza/commit/9f8521398d1ff023b958fad0b944cac265763866x-refsource-misc
- https://github.com/corazawaf/coraza/releases/tag/v3.8.1x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.