High 7.5Published Oct 6, 2026

CVE-2026-103670Gitea trusted workflow cancellation by unapproved fork runs

Updated under an hour ago (2026-10-19 08:30 UTC)

Does this affect you?

It affects Gitea. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.21%, higher than 11% of scored CVEs.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Gitea

Exploited in the last 30 days

When a Gitea Actions run was inserted, older runs in the same workflow-level concurrency group were cancelled without checking whether the new run still needed approval. Because fork pull request runs are inserted under the base repository, a user who can open a pull request from a fork could cancel trusted in-progress runs that share a concurrency group with `cancel-in-progress` enabled, without approval and without running any code. On self-hosted runners this can interrupt deployments and leave partial state behind.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-667
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.21% (percentile 11)
Assigned by: Gitea
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Gitea Gitea gitea:gitea (from the name)	through 1.27.3	CNA record
gitea gitea gitea:gitea	before 28.0.0	NVD

References

https://github.com/go-gitea/gitea/security/advisories/GHSA-4j4g-m7mr-hp5jvendor-advisory
https://github.com/go-gitea/gitea/pull/39399patch
https://blog.gitea.com/release-of-28.0.0/release-notes
https://github.com/go-gitea/gitea/releases/tag/v28.0.0release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.