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TI-2026-22133 Aliases CVE-2026-27775GHSA-649p-mmhf-85c7

Gitea pre-receive hook permission cache allows full repository write access

Priority HIGH 73CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
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 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00908 60th percentileScored 2026-11-07
Fix Fixed code.gitea.io/gitea (Go): 1.26.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
GiteaGitea Open Source Git Server1.25.5—No fix listedCNA
—code.gitea.io/gitea (Go)before 1.26.31.26.3Patch availableGHSA-649p-mmhf-85c7
  • Gitea Open Source Git Server VendorGitea Affected 1.25.5 Fixed in — No fix listed CNA
  • code.gitea.io/gitea (Go) Vendor— Affected before 1.26.3 Fixed in 1.26.3 Patch available GHSA-649p-mmhf-85c7

CPE names Threatist (inferred) · 1

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

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

Remediation

  • Fix · GHSA-649p-mmhf-85c7 code.gitea.io/gitea (Go) Fixed in 1.26.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27775
  2. 2026-10-03 Alias added: GHSA-649p-mmhf-85c7
  3. 2026-10-26 EPSS moved to the 50th–90th percentile

References

Patch 1

Advisory 2

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