by Kastro
Paper/Archive/CVE-2026-9312

CVE-2026-9312

GitHub Enterprise Server — Server-Side Request Forgery vulnerability in GitHub Enterprise Server allowed access to internal services via path traversal in upload endpoint

EPSS 9%CVSS 9.2
critical.is priorityof 100
47
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 95.3.953 × 2019.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

A server-side request forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to send crafted requests to internal services by exploiting insufficient input validation in an upload endpoint. By injecting path traversal content into request parameters, an attacker could bypass the intended request flow and redirect internal API calls, potentially accessing internal services and exposing sensitive credentials. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.17, 3.18.11, 3.19.8, 3.20.4, and 3.21.2. This vulnerability was reported via the GitHub Bug Bounty program.

Affected

ProductAffectedFixed inSource
Enterprise Server3.16.0 – 3.16.19–CNA
Enterprise Server3.17.0 – 3.17.16–CNA
Enterprise Server3.18.0 – 3.18.10–CNA
Enterprise Server3.19.0 – 3.19.7–CNA
Enterprise Server3.20.0 – 3.20.3–CNA
Enterprise Server3.21.0 – < 3.21.13.21.1CNA

Scores by source

GitHub_P (CNA)9.2CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refdocs.github.com/en/[email protected]/admin/release-notes#3.17.17refdocs.github.com/en/[email protected]/admin/release-notes#3.18.11refdocs.github.com/en/[email protected]/admin/release-notes#3.19.8refdocs.github.com/en/[email protected]/admin/release-notes#3.20.4refdocs.github.com/en/[email protected]/admin/release-notes#3.21.2