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TI-2026-08177 Aliases CVE-2026-9312GHSA-fwfp-h68w-2hcr

Server-side request forgery in GitHub Enterprise Server

Priority MEDIUM 53CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0916 95th percentileScored 2026-11-07
Fix Fixed Enterprise Server (GitHub): 3.21.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GitHubEnterprise Server3.16.0 – 3.16.19; 3.17.0 – 3.17.16; 3.18.0 – 3.18.10; 3.19.0 – 3.19.7; 3.20.0 – 3.20.3; 3.21.0 to before 3.21.13.21.1Patch availableCNA
  • Enterprise Server VendorGitHub Affected 3.16.0 – 3.16.19; 3.17.0 – 3.17.16; 3.18.0 – 3.18.10; 3.19.0 – 3.19.7; 3.20.0 – 3.20.3; 3.21.0 to before 3.21.1 Fixed in 3.21.1 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*3.16.0 to before 3.16.19; 3.17.0 to before 3.17.16; 3.18.0 to before 3.18.10; 3.19.0 to before 3.19.7; 3.20.0 to before 3.20.3VulnerableGitHub
cpe:2.3:a:github:enterprise_server:3.21.1:rc1:*:*:*:*:*:*3.21.1 rc1VulnerableGitHub
  • cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* Versions 3.16.0 to before 3.16.19; 3.17.0 to before 3.17.16; 3.18.0 to before 3.18.10; 3.19.0 to before 3.19.7; 3.20.0 to before 3.20.3 Vulnerable ·GitHub
  • cpe:2.3:a:github:enterprise_server:3.21.1:rc1:*:*:*:*:*:* Versions 3.21.1 rc1 Vulnerable ·GitHub

Remediation

  • Fix · CNA Enterprise Server (GitHub) Fixed in 3.21.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-9312
  2. 2026-10-03 Alias added: GHSA-fwfp-h68w-2hcr
  3. 2026-10-25 EPSS moved to the 95th–99th percentile

References

Other 5

  • TI-2024-04632 An authentication bypass vulnerability was present in the GitHub Enterprise Server (GHES)… CVSS 4.0CRITICAL 10.0
  • TI-2024-00181 Unsafe Reflection in Github Enterprise Server leading to Command Injection CVSS 3.1CRITICAL 9.8
  • TI-2024-00466 Privilege Escalation by Code Injection in the Management Console in GitHub Enterprise Server CVSS 3.1HIGH 8.8
  • TI-2026-03340 Remote code execution via git push option injection in GitHub Enterprise Server CVSS 4.0HIGH 8.7
  • TI-2024-08804 Improper signature verification in GitHub Enterprise Server CVSS 4.0CRITICAL 9.5
  • TI-2024-06303 Improper signature verification in GitHub Enterprise Server CVSS 4.0CRITICAL 9.5
See all 125 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences