CVE
CVE-2026-20896
Gitea Docker image trusts spoofable reverse-proxy headers by default
Gitea Docker image versions up to and including 1.26.2 use REVERSEPROXYTRUSTED_PROXIES=* by default, allowing any source IP to impersonate a user when reverse-proxy authentication headers such as X-WEBAUTH-USER are enabled.
Package Versions Affected
Package Version
patch Availability
No items found.
Automatically patch vulnerabilities without upgrading
Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request
CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-
Related Resources
No items found.
References
https://blog.gitea.com/release-of-1.26.3-and-1.26.4/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/20xxx/CVE-2026-20896.json, https://github.com/go-gitea/gitea/releases/tag/v1.26.3, https://github.com/go-gitea/gitea/security/advisories/GHSA-f75j-4cw6-rmx4, https://nvd.nist.gov/vuln/detail/CVE-2026-20896, https://github.com/go-gitea/gitea/pull/38151