Auth bypass in Github Enterprise Server
CVE-2026-3582
An Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with a classic personal access token (PAT) lacking the repo scope to retrieve issues and commits from private and internal repositories via the search REST API endpoints. The user must have had existing access to the repository through organization membership or as a collaborator for the vulnerability to be exploitable. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.16.15, 3.17.12, 3.18.6 and 3.19.3. This vulnerability was reported via the GitHub Bug Bounty program.
Vulnerability class: Broken Access Control
EPSS: 0.002 (16.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Github Enterprise Server — versions 3.16.0, 3.17.0, 3.18.0
- Github Enterprise_server
Weakness classification (CWE)
References
- product-cna@github.com (Release Notes)
- product-cna@github.com (Release Notes)
- product-cna@github.com (Release Notes)
- product-cna@github.com (Release Notes)
Frequently asked questions
- What is CVE-2026-3582?
- CVE-2026-3582 is a medium-severity vulnerability in Github Enterprise Server, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-03-10.
- How severe is CVE-2026-3582?
- Medium severity. CVSS v3 base score is 4.3 out of 10.