Is CVE-2021-22869 actively exploited?

No active exploitation of CVE-2021-22869 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-22869 be exploited remotely?

Yes. CVE-2021-22869 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-22869?

CVE-2021-22869 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-22869

CWE-668Published: September 24, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-22869 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.