---
id: CVE-2026-9312
title: >-
  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…
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…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-918
vendor: github
product: enterprise_server
affected:
  - 'enterprise_server >= 3.16.0, < 3.16.19'
  - 'enterprise_server >= 3.17.0, < 3.17.16'
  - 'enterprise_server >= 3.18.0, < 3.18.10'
  - 'enterprise_server >= 3.19.0, < 3.19.7'
  - 'enterprise_server >= 3.20.0, < 3.20.3'
  - enterprise_server = 3.21.1
patched:
  - enterprise_server 3.20.3
published: '2026-05-27'
updated: '2026-06-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-9312'
references:
  - url: >-
      https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17
    label: product-cna@github.com
  - url: >-
      https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11
    label: product-cna@github.com
  - url: >-
      https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.8
    label: product-cna@github.com
  - url: >-
      https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.4
    label: product-cna@github.com
  - url: >-
      https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.2
    label: product-cna@github.com
tags:
  - nvd
epss: 0.06552
epssPercentile: 0.9351
ingestedAt: '2026-07-01T09:50:45.863Z'
---

## Overview

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

- `enterprise_server >= 3.16.0, < 3.16.19`
- `enterprise_server >= 3.17.0, < 3.17.16`
- `enterprise_server >= 3.18.0, < 3.18.10`
- `enterprise_server >= 3.19.0, < 3.19.7`
- `enterprise_server >= 3.20.0, < 3.20.3`
- `enterprise_server = 3.21.1`

## Remediation

Upgrade past the affected range:

- `enterprise_server 3.20.3`