CVE-2026-103670

highpriority · track · 0EPSS 0.002 · 12 %ileDEUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.21% (12th) EPSS

CVSS 7.5 · high

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

osv · cert_bund · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-667US

affected products (6)

Products and version ranges known to be affected.

Open Source Gitea <28.0.0all versionscert_bundDE
Open Source Gitea <28.0.1all versionscert_bundDE
Open Source Gitea< 28.0.0cert_bundDE
Open Source Gitea< 28.0.1cert_bundDE
gitea gitea< 28.0.0nvdUScpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*
Bitnami gitea< 28.0.0osvUSpkg:bitnami/gitea

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3792Gitea: Mehrere SchwachstellenDeutsch2026-10-06csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Gitea ausnutzen, um beliebigen Programmcode auszuführen, erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen sowie Cross-Site-Scripting-Angriffe durchzuführen.
BIT-gitea-2026-103670Gitea trusted workflow cancellation by unapproved fork runs2026-10-16vendor · osvUS
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.

also known as (1)

Other names and identifiers for this entity.

GHSA-4j4g-m7mr-hp5j osv

sources

Which sources assert this record, and when.

osv cert_bund nvd NVD CVE.org MITRE

published 2026-10-06modified 2026-10-15

references (4) nvd

External citations — patches, advisories, analysis.

https://blog.gitea.com/release-of-28.0.0/Release Notes
https://github.com/go-gitea/gitea/pull/39399Patch
https://github.com/go-gitea/gitea/releases/tag/v28.0.0Release Notes
https://github.com/go-gitea/gitea/security/advisories/GHSA-4j4g-m7mr-hp5jVendor Advisory

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan