CVE-2026-9312
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 9.2 CRITICALCVSS: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/M
- EPSS
- 6.55% probability · 93th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-918
- Affected
- github/enterprise server
- Source
- product-cna@github.com
References
- https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17Product, Release Notes
- https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11Product, Release Notes
- https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.8Product, Release Notes
- https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.4Product, Release Notes
- https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.2
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.