CVE-2021-22862

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

An improper access control vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with the ability to fork a repository to disclose Actions secrets for the parent repository of the fork. This vulnerability existed due to a flaw that allowed the base reference of a pull request to be updated to point to an arbitrary SHA or another pull request outside of the fork repository. By establishing this incorrect reference in a PR, the restrictions that limit the Actions secrets sent a workflow from forks could be bypassed. This vulnerability affected GitHub Enterprise Server version 3.0.0, 3.0.0.rc2, and 3.0.0.rc1. This vulnerability was reported via the GitHub Bug Bounty program.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-285

Affected software

VendorProductVersions
GitHubGitHub Enterprise Server>= 3.0, < 3.0.1

References

Timeline

Published
Mar 3, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-22862: Medium severity, CVSS 6.5 | Vulnix