CVE-2026-104632: Gitea fork workflow approval bypass through cancel and rerun

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-06 · updated 2026-10-13
Weakness: CWE-285

Description

Gitea Actions blocks the jobs of workflow runs from first-time fork pull request contributors until a maintainer approves the run. The rerun path only required a run to be finished and built the new attempt's jobs without considering the pending approval, so when a user with Actions write access cancelled a run that was awaiting approval and then re-ran it, the new jobs were created as waiting rather than blocked while the run still recorded that approval was required. Cancelling and re-running stale fork checks is a routine action that does not involve the approval control, so where Actions is enabled and a matching runner is registered, workflow code taken from the fork pull request head could run on the repository's runners without an explicit approval.

Affected products

Gitea Open Source Git Server: before 28.0.0 — fixed in 28.0.0

How to fix

Upgrade to a fixed version: Gitea Open Source Git Server 28.0.0. Check the vendor advisory for mitigations.

References

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