CVE-2026-27775

Description

Gitea 1.25.5 caches a branch-specific write-permission result across multiple refs in one pre-receive hook session, allowing a per-branch maintainer-edit grant to be reused for other refs and escalate to full repository write access.

References

• https://blog.gitea.com/release-of-1.26.3-and-1.26.4/
• https://github.com/go-gitea/gitea/pull/38151
• https://github.com/go-gitea/gitea/releases/tag/v1.26.3
• https://github.com/go-gitea/gitea/security/advisories/GHSA-649p-mmhf-85c7