Threat actors are exploiting a vulnerability in Gitea’s reverse-proxy authentication mechanism to access internet-accessible instances by supplying only a valid username.

CVE-2026-20896 lets reachable Gitea Docker containers trust spoofed X-WEBAUTH-USER headers when reverse proxy auth is enabled.

Threat actors are exploiting a vulnerability in Gitea’s reverse-proxy authentication mechanism to access internet-accessible instances by supplying only a valid username.

Hackers are actively exploiting a critical vulnerability in the official Docker image for the Gitea self-hosted Git service that allows attackers to impersonate any user,…