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Critical severity · published Jul 3, 2026
CVE-2026-27780
Gitea pre-receive hook can miss branch-protection checks after scanner errors
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
Gitea Open Source Git Server · Gitea
before 1.26.0 · source: vendor
Affected product
GO
Gitea Open Source Git Server
Gitea
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27780
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27780
blog.gitea.com
https://blog.gitea.com/release-of-1.26.0/
github.com
https://github.com/go-gitea/gitea/pull/36963
github.com
https://github.com/go-gitea/gitea/releases/tag/v1.26.0
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