SSRF in Github Enterprise Server
CVE-2026-8606
A Server-Side Request Forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an attacker to cause the server to issue HTTP requests to internal services via the security advisories package lookup feature. By d…
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.001 (18.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Github Enterprise Server — versions 3.21.0, 3.20.0, 3.19.0
- Github Enterprise_server — versions 3.21.0
Weakness classification (CWE)
References
- product-cna@github.com (release-notes, Product, Release Notes)
- product-cna@github.com (release-notes, Product, Release Notes)
- product-cna@github.com (release-notes, Product, Release Notes)
- product-cna@github.com (release-notes, Product, Release Notes)
- product-cna@github.com (release-notes, Product, Release Notes)
- product-cna@github.com (release-notes, Product, Release Notes)
Frequently asked questions
- What is CVE-2026-8606?
- CVE-2026-8606 is a medium-severity vulnerability in Github Enterprise Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.9/10. Published 2026-05-27.
- How severe is CVE-2026-8606?
- Medium severity. CVSS v3 base score is 5.9 out of 10.