CVE-2026-9312

CRITICAL EPSS 93.0%
Published May 27, 20261mo ago · Modified Jun 17, 20261w ago
9.2 CVSS 4.0
Critical
Find Similar
Published May 27, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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 3.16.20, 3.17.17, 3.18.11, 3.19.8, 3.20.4, and 3.21.1. This vulnerability was reported via the GitHub Bug Bounty program.

CVSS Details

Base Score
9.2
Exploitability
—
Impact
—
Vector string
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:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
93.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

Affected Products 6

VendorProductVersionRange
githubenterprise_server*≥3.16.0  –  <3.16.19
githubenterprise_server*≥3.17.0  –  <3.17.16
githubenterprise_server*≥3.18.0  –  <3.18.10
githubenterprise_server*≥3.19.0  –  <3.19.7
githubenterprise_server*≥3.20.0  –  <3.20.3
githubenterprise_server3.21.1any

References 6

  • docs.github.com https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.20
    ProductRelease Notes
  • docs.github.com https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17
    ProductRelease Notes
  • docs.github.com https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11
    ProductRelease Notes
  • docs.github.com https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.8
    ProductRelease Notes
  • docs.github.com https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.4
    ProductRelease Notes
  • docs.github.com https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.1
    ProductRelease Notes

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.