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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (31.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- GitHub Enterprise Server — versions 3.16.0, 3.17.0, 3.18.0
- GitHub Enterprise Server
Weakness classification (CWE)
References
- docs.github.com/en/enterprise-server@3.16/admin/release-notes (Release Notes)
- docs.github.com/en/enterprise-server@3.17/admin/release-notes (Release Notes)
- docs.github.com/en/enterprise-server@3.18/admin/release-notes (Release Notes)
- docs.github.com/en/enterprise-server@3.19/admin/release-notes (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.