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Medium severity6.5NVD Advisory· Published Mar 3, 2021· Updated Jun 17, 2026

CVE-2021-22861

CVE-2021-22861

Description

An improper access control vulnerability was identified in GitHub Enterprise Server that allowed authenticated users of the instance to gain write access to unauthorized repositories via specifically crafted pull requests and REST API requests. An attacker would need to be able to fork the targeted repository, a setting that is disabled by default for organization owned private repositories. Branch protections such as required pull request reviews or status checks would prevent unauthorized commits from being merged without further review or validation. This vulnerability affected all versions of GitHub Enterprise Server since 2.4.21 and was fixed in versions 2.20.24, 2.21.15, 2.22.7 and 3.0.1. This vulnerability was reported via the GitHub Bug Bounty program.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

4
  • GitHub/GitHub2 versions
    cpe:2.3:a:github:github:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:github:github:*:*:*:*:*:*:*:*range: >=3.0.0,<3.0.1
    • cpe:2.3:a:github:github:*:*:*:*:enterprise:*:*:*range: >=2.4.21,<2.20.24
  • GitHub/Enterprise Serverllm-fuzzy2 versions
    >=2.4.21, <2.20.24, <2.21.15, <2.22.7, <3.0.1+ 1 more
    • (no CPE)range: >=2.4.21, <2.20.24, <2.21.15, <2.22.7, <3.0.1
    • (no CPE)range: 2.20

Patches

Vulnerability mechanics

References

4

News mentions

0

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