CVE-2026-27780

EUVD-2026-41638
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 38.77%
Common Weakness Enumeration
References
https://blog.gitea.com/release-of-1.26.0/
https://github.com/go-gitea/gitea/pull/36963
https://github.com/go-gitea/gitea/releases/tag/v1.26.0