CVE-2026-27780: Gitea pre-receive hook scanner errors allow branch-protection bypass

July 3, 2026 (updated September 1, 2026)

Gitea versions before 1.26.0 do not fail closed on bufio.Scanner errors while processing pre-receive hook input, allowing oversized input to bypass branch-protection checks.

References

blog.gitea.com/release-of-1.26.0
github.com/advisories/GHSA-vhq7-fwwh-7hjf
github.com/go-gitea/gitea/commit/c453d09c36fad094405314dba2f370434b200711
github.com/go-gitea/gitea/pull/36963
github.com/go-gitea/gitea/releases/tag/v1.26.0
nvd.nist.gov/vuln/detail/CVE-2026-27780

Code Behaviors & Features

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