Gitea up to 1.27.3 Actions behavioral workflow

Summaryinfo

A vulnerability labeled as critical has been found in Gitea up to 1.27.3. Affected by this issue is some unknown functionality of the component Actions. Such manipulation leads to behavioral workflow. This vulnerability is documented as CVE-2026-104632. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Gitea up to 1.27.3 and classified as critical. Affected by this issue is an unknown part of the component Actions. The manipulation with an unknown input leads to a behavioral workflow vulnerability. Using CWE to declare the problem leads to CWE-841. The product supports a session in which more than one behavior must be performed by an actor, but it does not properly ensure that the actor performs the behaviors in the required sequence. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-104632 since 10/04/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/06/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• Gitea

Version

• 1.27.0
• 1.27.1
• 1.27.2
• 1.27.3

License

• open-source

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