CVE-2026-103670

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://blog.gitea.com/release-of-28.0.0/	Release Notes
https://github.com/go-gitea/gitea/pull/39399	Patch
https://github.com/go-gitea/gitea/releases/tag/v28.0.0	Release Notes
https://github.com/go-gitea/gitea/security/advisories/GHSA-4j4g-m7mr-hp5j	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*

History

15 Oct 2026, 02:23

Type	Values Removed	Values Added
First Time		Gitea gitea Gitea
CPE		cpe:2.3:a:gitea:gitea::::::::
References	~~() https://blog.gitea.com/release-of-28.0.0/ -~~	() https://blog.gitea.com/release-of-28.0.0/ - Release Notes
References	~~() https://github.com/go-gitea/gitea/pull/39399 -~~	() https://github.com/go-gitea/gitea/pull/39399 - Patch
References	~~() https://github.com/go-gitea/gitea/releases/tag/v28.0.0 -~~	() https://github.com/go-gitea/gitea/releases/tag/v28.0.0 - Release Notes
References	~~() https://github.com/go-gitea/gitea/security/advisories/GHSA-4j4g-m7mr-hp5j -~~	() https://github.com/go-gitea/gitea/security/advisories/GHSA-4j4g-m7mr-hp5j - Vendor Advisory

07 Oct 2026, 16:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CWE		CWE-667

06 Oct 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-06 20:17

Updated : 2026-10-15 02:23

NVD link : CVE-2026-103670

Mitre link : CVE-2026-103670

CVE.ORG link : CVE-2026-103670

JSON object : View

Products Affected

gitea

gitea

CWE

CWE-667

Improper Locking

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