Improper access control in Gitea Open Source Git Server
Priority MEDIUM 63CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-284.
Summary
Webhooks created by a collaborator keep firing after their repo access is revoked → ongoing real-time exfiltration of private repo content (incomplete revocation cleanup in `DeleteCollaboration`)
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00483 41st percentileScored 2026-11-07
Fix Partial gitea.dev (Go): 1.27.0Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
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 | up to 1.26.4 | — | No fix listed | CNA |
| — | gitea.dev (Go) | before 1.27.0 | 1.27.0 | Patch available | GHSA-66m4-5jjr-2rg5 |
- Gitea Open Source Git Server VendorGitea Affected up to 1.26.4 Fixed in — No fix listed CNA
- gitea.dev (Go) Vendor— Affected before 1.27.0 Fixed in 1.27.0 Patch available GHSA-66m4-5jjr-2rg5
Remediation
- Fix · GHSA-66m4-5jjr-2rg5 gitea.dev (Go) Fixed in 1.27.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Pipelines | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-58440
- 2026-10-03 Alias added: GHSA-66m4-5jjr-2rg5
References
Advisory 1
Other 7
- Gitea v1.27.0 Release
- Gitea v1.27.0 Release Blog Post
- https://github.com/go-gitea/gitea/pull/38406
- https://github.com/go-gitea/gitea/pull/38426
- https://github.com/go-gitea/gitea/commit/de4b8277e9cb576f2315fb03b5ab6478b42a1d31
- https://github.com/go-gitea/gitea/commit/f69e15afe7496cc62e96dab244629c69eb31a7bf
- https://github.com/go-gitea/gitea
More Gitea vulnerabilities
- 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
Sources
- CVE-2026-58440 · CVE Program
- CVE-2026-58440 · NVD
- FIRST EPSS
- GHSA-66m4-5jjr-2rg5 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-58440 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences