Security Flaw in Gitea Actions Affecting Workflow Runs from Fork Pull Requests
CVE-2026-104632

8.8HIGH

Key Information:

Vendor

Gitea

Status
Gitea
Vendor
CVE Published:
6 October 2026

What is CVE-2026-104632?

The Gitea Actions feature has a significant flaw that affects the handling of job runs from first-time contributors submitting fork pull requests. Until a maintainer approves these runs, they are meant to be blocked. However, if a user with Actions write access cancels a pending workflow run that requires approval and immediately re-runs it, the system incorrectly allows the new jobs to be created and wait instead of remaining blocked. This oversight enables unauthorized re-execution of workflow code from forked pull request heads on the repository's runners, bypassing the necessary approval controls when Actions is enabled and a corresponding runner is registered.

Affected Version(s)

Gitea 0 <= 1.27.3

References

https://github.com/go-gitea/gitea/security/advisories/GHS...
vendor-advisory
https://github.com/go-gitea/gitea/pull/39399
patch
https://blog.gitea.com/release-of-28.0.0/
release-notes

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

https://github.com/DshtAnger
https://github.com/bircni
https://github.com/silverwind
.