GitHub Enterprise Server 3.20.3 Addresses Critical Security Flaws

Gbhackers •Divya • May 27, 2026

GitHub has released Enterprise Server (GHES) version 3.20.3, addressing multiple critical and high-severity vulnerabilities that could allow attackers to access internal services, escalate privileges, and extract sensitive data. The update, published on May 26, 2026, also introduces an important security change requiring administrators to rotate cryptographic signing keys before applying the patch. The most severe […]

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GitHub Enterprise Server 3.20.3 Patch Addresses Critical Vulnerabilities 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. 3 sources 74

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GitHub Enterprise Server