Vulnerability Description
Gitea Docker image versions up to and including 1.26.2 use REVERSE_PROXY_TRUSTED_PROXIES=* by default, allowing any source IP to impersonate a user when reverse-proxy authentication headers such as X-WEBAUTH-USER are enabled.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://blog.gitea.com/release-of-1.26.3-and-1.26.4/
- https://github.com/go-gitea/gitea/pull/38151
- https://github.com/go-gitea/gitea/releases/tag/v1.26.3
- https://github.com/go-gitea/gitea/security/advisories/GHSA-f75j-4cw6-rmx4
- https://github.com/go-gitea/gitea/security/advisories/GHSA-f75j-4cw6-rmx4
FAQ
What is CVE-2026-20896?
CVE-2026-20896 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Gitea Docker image versions up to and including 1.26.2 use REVERSE_PROXY_TRUSTED_PROXIES=* by default, allowing any source IP to impersonate a user when reverse-proxy authentication headers such as X-...
How severe is CVE-2026-20896?
CVE-2026-20896 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-20896?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.