CVE-2026-66877
- Source
- https://cve.org/CVERecord?id=CVE-2026-66877
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66877.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-66877
- Aliases
-
- GHSA-v2w8-m4gr-qj65
- Published
- 2026-10-14T14:36:11Z
- Modified
- 2026-10-28T02:30:56Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- Gitea fork workflow approval bypass through concurrency cancellation
- Details
-
Gitea enforces first-time fork contributor approval by blocking jobs, but some job transition and dispatch paths do not re-check the run's approval requirement. A separate run sharing a job-level concurrency group can cancel a pending job and cause its blocked sibling jobs to be re-emitted and dispatched without approval. This allows unreviewed workflow code to execute on self-hosted runners; fork secrets remain withheld and the run token remains read-only.
- Database specific
{ "cna_assigner": "Gitea", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66877.json" }- References
-
- https://blog.gitea.com/release-of-1.27.3/
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66877.json
- https://github.com/go-gitea/gitea/releases/tag/v1.27.3
- https://github.com/go-gitea/gitea/security/advisories/GHSA-v2w8-m4gr-qj65
- https://nvd.nist.gov/vuln/detail/CVE-2026-66877
- https://github.com/go-gitea/gitea/pull/39005
- https://github.com/go-gitea/gitea/pull/39018
Affected packages
Git / github.com/go-gitea/gitea
Affected ranges
- Type
- GIT
- Repo
- https://github.com/go-gitea/gitea
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "last_affected": "1.27.2" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "original_tag": "v1.27.3", "range": [ { "fixed": "146cc3eec57174711eac0e0a0c7b38670c6e3922" } ], "source": "REFERENCES_TAG" } ] }
Affected versions
v0.*
v0.9.99
v1.*
v1.0.0
v1.1.0
v1.10.0-dev
v1.10.0-rc1
v1.10.5
v1.11.0-dev
v1.11.0-rc1
v1.12.0-dev
v1.13.0-dev
v1.14.0-dev
v1.15.0-dev
v1.15.0-rc1
v1.16.0-dev
v1.16.0-rc1
v1.17.0-dev
v1.18.0-dev
v1.18.0-rc0
v1.19.0-dev
v1.19.0-rc0
v1.20.0-dev
v1.20.0-rc0
v1.21.0-dev
v1.21.0-rc0
v1.22.0-dev
v1.22.0-rc0
v1.22.0-rc1
v1.23.0-dev
v1.24.0-dev
v1.25.0-dev
v1.26.0-dev
v1.27.0
v1.27.0-dev
v1.27.0-rc0
v1.27.1
v1.27.2
v1.28.0-dev
v1.5.0-dev
v1.5.0-rc1
v1.6.0-dev
v1.6.0-rc1
v1.7.0-dev
v1.9.0-dev
v1.9.0-rc1