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Vulnerability record · CVE-2026-9312 · published 27 May 2026

CVE-2026-9312: Github enterprise server server-side request forgery (ssrf) vulnerability

Github · Enterprise Server

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.

9.2 CVSS 4.0 Critical EPSS 0.59% · top 53.9% CWE-918 · Server-side request forgery (SSRF)
9.2CVSS 4.0 base score
0.59%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
23 Jul 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://docs.github.com/en/[email protected]/admin/release-notes#3.17.17 ProductRelease Notes
https://docs.github.com/en/[email protected]/admin/release-notes#3.18.11 ProductRelease Notes
https://docs.github.com/en/[email protected]/admin/release-notes#3.19.8 ProductRelease Notes
https://docs.github.com/en/[email protected]/admin/release-notes#3.20.4 ProductRelease Notes
https://docs.github.com/en/[email protected]/admin/release-notes#3.21.2

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Source: NIST National Vulnerability Database (record CVE-2026-9312), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.