What’s Vulnerable › Vulnerabilities

CVE-2026-104626: Gitea fork workflow job revival through later approval

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% 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-841

Description

A user who can open a fork pull request can place workflow content with a shared run-level concurrency group into a Gitea Actions run that is awaiting approval. When a later run in that group cancels the blocked job, the run becomes terminal while still marked as needing approval. If a maintainer later approves the run, Gitea passed the already-cancelled job back through concurrency preparation, set it to waiting, and made it claimable by a matching runner, executing fork-controlled workflow code. Exploitation requires the maintainer's later approval action, Actions to be enabled, and a runner that accepts the repository's jobs.

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

• https://blog.gitea.com/release-of-28.0.0/
• https://github.com/go-gitea/gitea/pull/39399
• https://github.com/go-gitea/gitea/releases/tag/v28.0.0
• https://github.com/go-gitea/gitea/security/advisories/GHSA-93pj-3x56-5gc2

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