CVE-2026-89430

Summary

Gitea validated a push mirror's remote address against the [migrations] allow and block lists only when the mirror was created. Each synchronization passed the stored address directly to git push, so a name that later resolved to a blocked or internal address was still reached. A user with administrator access to a repository, which includes repositories they create themselves, could aim push mirror synchronization at internal Git services and force-push the repository's contents to them.

Affected Software

VendorProductVersion RangeStatus
GiteaGitea0 <= 1.27.3affected

Weaknesses

  • CWE-367: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-918: CWE-918: Server-Side Request Forgery (SSRF)

References