CVE-2021-22869: GitHub Enterprise Server

Critical severity, CVSS 9.8. EPSS: 1.2% chance of exploitation in the next 30 days.

An improper access control vulnerability in GitHub Enterprise Server allowed a workflow job to execute in a self-hosted runner group it should not have had access to. This affects customers using self-hosted runner groups for access control. A repository with access to one enterprise runner group could access all of the enterprise runner groups within the organization because of improper authentication checks during the request. This could cause code to be run unintentionally by the incorrect runner group. This vulnerability affected GitHub Enterprise Server versions from 3.0.0 to 3.0.15 and 3.1.0 to 3.1.7 and was fixed in 3.0.16 and 3.1.8 releases.

Affected products

• GitHub Enterprise Server: from 3.0.0, before 3.0.16 (fixed in 3.0.16); from 3.1.0, before 3.1.8 (fixed in 3.1.8)

Published 2021-09-24. Last modified 2026-06-17.