Vulnerability advisory

CVE-2026-20896

Gitea Docker image trusts spoofable reverse-proxy headers by default

Published Jul 3, 2026Updated Oct 28, 2026OSV record ↗

Also known as GHSA-f75j-4cw6-rmx4GO-2026-6051

Severity

CVSS 3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected versions

Repository

Affected commits	Fixed by commit
GIT github.com/go-gitea/gitea ↗
All commits before 4aa0d704f2c7d30351016b740bfc45247fd77efa	`4aa0d704f2c7d30351016b740bfc45247fd77efa`
Also listed as affected (43) `v1.26.2` `v1.26.1` `v1.26.0` `v1.26.0-rc0` `v1.27.0-dev` `v1.26.0-dev` `v1.25.0-dev` `v1.24.0-dev` `v1.22.0-rc1` `v1.23.0-dev` `v1.22.0-rc0` `v1.21.0-rc0` `v1.22.0-dev` `v1.20.0-rc0` `v1.21.0-dev` `v1.20.0-dev` `v1.19.0-rc0` `v1.18.0-rc0` `v1.19.0-dev` `v1.18.0-dev` `v1.17.0-dev` `v1.16.0-rc1` `v1.15.0-rc1` `v1.16.0-dev` `v1.15.0-dev` `v1.14.0-dev` `v1.13.0-dev` `v1.12.0-dev` `v1.10.5` `v1.11.0-rc1` `v1.10.0-rc1` `v1.11.0-dev` `v1.9.0-rc1` `v1.10.0-dev` `v1.9.0-dev` `v1.7.0-dev` `v1.6.0-rc1` `v1.6.0-dev` `v1.5.0-rc1` `v1.5.0-dev` `v1.1.0` `v1.0.0` `v0.9.99`

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.

CVE-2026-20896

Affected versions

Repository

Description

References