CVE-2026-9312 json
Server-Side Request Forgery vulnerability in GitHub Enterprise Server allowed access to internal services via path traversal in upload endpoint
published 2026-05-27 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-32027
- cvss
- 8.2
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 9.2%
- EPSS 9.2% chance of exploitation in 30 days, percentile 95%
- public exploits
- 0
- none known
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.
Patch / fix
- GitHub Enterprise Server 3.16.20, 3.17.17, 3.18.11, 3.19.8, 3.20.4, 3.21.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
9.16% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.2 | 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 |
| CNA | 4.0 | 9.2 | 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 |
| NVD | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
Affected products
- GitHub Enterprise Server
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
docs.github.com
/en/enterprise-server@3.17/admin/release-notes#3.17.17
release-notes, product
-
docs.github.com
/en/enterprise-server@3.18/admin/release-notes#3.18.11
release-notes, product
-
docs.github.com
/en/enterprise-server@3.19/admin/release-notes#3.19.8
release-notes, product
-
docs.github.com
/en/enterprise-server@3.20/admin/release-notes#3.20.4
release-notes, product
-
docs.github.com
/en/enterprise-server@3.21/admin/release-notes#3.21.2
release-notes
Sources
- CVE List CVE-2026-9312
- NVD CVE-2026-9312
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