CVE-2026-20896: Gitea Open Source Git Server

Critical severity, CVSS 9.8. EPSS: 2.8% chance of exploitation in the next 30 days.

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.

Affected products

• Gitea Gitea Open Source Git Server: up to and including 1.26.2

Published 2026-07-03. Last modified 2026-07-07.