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CVE-2026-9312

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

Published: May 27, 2026Updated: Jun 2, 2026 Sources: CVE List NVD BDUCWE-918
NVD MITRE
8.2CVSSHIGH
EPSS Score
0.3%
Top 76.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-918

Affected Products

Enterprise ServerGitHubDevTools & CI
enterprise servergithubDevTools & CI
GitHub Enterprise ServerGitHub Inc
SaaS
DevTools & CI / source-control
githubcommercialUSDevTools & CIaka github
github inccommercialUSDevTools & CIaka github

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.20
docs.github.com
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17
docs.github.com
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11
docs.github.com
and 8 more references View all →

Timeline

Published
May 27, 2026
Last Updated
Jun 2, 2026
News mentions
1

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