Hackers are actively exploiting CVE-2026-20896, a critical authentication bypass in Gitea’s official Docker image that can let attackers impersonate any user, including administrators. Gitea and Singapore’s cybersecurity agency have urged users to upgrade to fixed versions or restrict trusted proxy settings while reviewing logs for signs of compromise. #CVE-2026-20896 #Gitea #Sysdig #CSA
Keypoints
- CVE-2026-20896 affects Gitea’s official Docker image in the default configuration.
- The flaw lets attackers impersonate users through reverse-proxy authentication headers.
- Administrators are the main target because their accounts can be forged.
- Sysdig observed in-the-wild exploitation less than two weeks before public disclosure.
- Gitea released versions 1.26.3 and 1.26.4, and CSA advised restricting trusted proxies if upgrading is not possible.