What’s Vulnerable › Vulnerabilities

CVE-2023-6847: Improper Authentication in GitHub Enterprise Server leading to Authentication Bypass for Public Repository Data

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-21 · updated 2026-06-17
• Weakness: CWE-287

Description

An improper authentication vulnerability was identified in GitHub Enterprise Server that allowed a bypass of Private Mode by using a specially crafted API request. To exploit this vulnerability, an attacker would need network access to the Enterprise Server appliance configured in Private Mode. This vulnerability affected all versions of GitHub Enterprise Server since 3.9 and was fixed in version 3.9.7, 3.10.4, and 3.11.1. This vulnerability was reported via the GitHub Bug Bounty program.

Affected products

• GitHub Enterprise Server: from 3.9.0 before 3.9.7; from 3.10.0 before 3.10.4; 3.11.0 — fixed in 3.10.4, 3.9.7

How to fix

Upgrade to a fixed version: GitHub Enterprise Server 3.10.4, 3.9.7. Check the vendor advisory for mitigations.

References

• https://docs.github.com/en/enterprise-server@3.10/admin/release-notes#3.10.4
• https://docs.github.com/en/enterprise-server@3.11/admin/release-notes#3.11.1
• https://docs.github.com/en/enterprise-server@3.9/admin/release-notes#3.9.7
• https://docs.github.com/en/enterprise-server@3.10/admin/release-notes#3.10.4
• https://docs.github.com/en/enterprise-server@3.11/admin/release-notes#3.11.1
• https://docs.github.com/en/enterprise-server@3.9/admin/release-notes#3.9.7

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