TI-2026-22138 Aliases CVE-2026-27780 GHSA-vhq7-fwwh-7hjf

Gitea pre-receive hook can miss branch-protection checks after scanner errors

MEDIUM 50CWE-863Published 2026-07-03 · Updated 2026-07-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00638 50th percentileScored 2026-11-07

Fix Fixed Gitea Open Source Git Server (Gitea): 1.26.0code.gitea.io/gitea (Go): 1.26.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Gitea	Gitea Open Source Git Server	before 1.26.0	1.26.0	Patch available	CNA
—	code.gitea.io/gitea (Go)	before 1.26.0	1.26.0	Patch available	GHSA-vhq7-fwwh-7hjf

Gitea Open Source Git Server VendorGitea Affected before 1.26.0 Fixed in 1.26.0 Patch available CNA
code.gitea.io/gitea (Go) Vendor— Affected before 1.26.0 Fixed in 1.26.0 Patch available GHSA-vhq7-fwwh-7hjf

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:gitea:gitea::::::::	—	—	Gitea

cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:* Versions — — ·Gitea

Remediation

Fix · CNA Gitea Open Source Git Server (Gitea) Fixed in 1.26.0
Fix · GHSA-vhq7-fwwh-7hjf code.gitea.io/gitea (Go) Fixed in 1.26.0 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-07-03
Gitea Open Source Git Server 1.26.0
3 records Highest priority Priority HIGH 2 HIGH, 1 MEDIUM
Other records, highest priority first
- TI-2026-22945 Gitea 3D file viewer allows stored XSS through glTF extensionsRequiredPriority HIGH 71
- TI-2026-18124 Gitea organization forks can expose organization secrets without create permissionPriority HIGH 70
Show all 3 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-27780
2026-10-03 Alias added: GHSA-vhq7-fwwh-7hjf
2026-10-25 EPSS moved to the 50th–90th percentile

References

Patch 1

GitHub Pull Request #36963

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-27780

Other 5

TI-2026-42785 Gitea before 1.27.1 allows remote code execution via the diffpatch API through Git hook installation. KEVCVSS 3.1CRITICAL 9.8
TI-2026-42033 Improper authorization on OAuth sign-in callback silently re-enables administrator-disabled accounts CVSS 3.1CRITICAL 9.8
TI-2026-40842 Privilege Escalation via Access Token Scope Escalation in API CVSS 3.1CRITICAL 9.8
TI-2026-16922 Gitea Docker image trusts spoofable reverse-proxy headers by default CVSS 3.1CRITICAL 9.8
TI-2026-42043 Team-repository linking endpoint bypasses the RepoAdminChangeTeamAccess organization setting CVSS 3.1CRITICAL 9.1
TI-2026-40381 OIDC userinfo Endpoint Returns Identity Claims Without Enforcing API Token Scopes CVSS 3.1CRITICAL 9.1

See all 240 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences