High severity · published Oct 6, 2026
CVE-2026-104626
Gitea fork workflow job revival through later approval
8.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
Gitea · Gitea
through 1.27.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104626
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104626
vendor-advisory
https://github.com/go-gitea/gitea/security/advisories/GHSA-93pj-3x56-5gc2
patch
https://github.com/go-gitea/gitea/pull/39399
release-notes
https://blog.gitea.com/release-of-28.0.0/
release-notes
https://github.com/go-gitea/gitea/releases/tag/v28.0.0
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