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GitHub Enterprise Server 3.20.3 Patch Addresses Critical Vulnerabilities

GitHub Enterprise Server 3.20.3 Patch Addresses Critical Vulnerabilities

First seen 27 May 2026, 15:27 UTC • •
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ThreatCluster AI
ThreatCluster •May 28, 2026 at 15:19 UTC
  • •GitHub Enterprise Server 3.20.3 fixes multiple critical vulnerabilities.
  • •Administrators must rotate cryptographic signing keys before applying the patch.
  • •Organizations using earlier 3.20.x versions should upgrade immediately.

GitHub released Enterprise Server (GHES) version 3.20.3 on May 26, 2026, to address multiple critical and high-severity vulnerabilities. These flaws could allow attackers to access internal services, escalate privileges, and extract sensitive data. The update mandates that administrators rotate cryptographic signing keys before applying the patch. Organizations using earlier 3.20.x versions are strongly encouraged to upgrade to mitigate risks associated with network-exposed and multi-tenant deployments. Specific CVEs were not disclosed in the articles, but the vulnerabilities are deemed serious enough to warrant immediate action from affected organizations.

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Updated 164d ago How this analysis works

Timeline

2026-05-26
GitHub releases GHES 3.20.3
The new version addresses critical vulnerabilities and requires key rotation for security.
Gbhackers
2026-05-26
Security advisory issued
Organizations are urged to upgrade to GHES 3.20.3 to close serious security gaps.
Cybersecuritynews

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