CVE-2026-9312
No exploitation reported by the sources we read.
- Published2026-05-27
- Fixed in3.20.3 · 3.19.7 · 3.18.10 · 3.17.16 · 3.16.19
- WeaknessCWE-918
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2026-05-2700:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-25 15:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-9312?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-9312?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.20 | ≥ 3.20.0, < 3.20.3 | 3.20.3 | NVD |
| 3.19 | ≥ 3.19.0, < 3.19.7 | 3.19.7 | NVD |
| 3.18 | ≥ 3.18.0, < 3.18.10 | 3.18.10 | NVD |
| 3.17 | ≥ 3.17.0, < 3.17.16 | 3.17.16 | NVD |
| 3.16 | ≥ 3.16.0, < 3.16.19 | 3.16.19 | NVD |
| 3.21 | = 3.21.1 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Github enterprise server to 3.20.3 · 3.19.7 · 3.18.10 · 3.17.16 · 3.16.19
Advisories and patches
- docs.github.comRelease Notes
- docs.github.comRelease Notes
- docs.github.comRelease Notes
- docs.github.comRelease Notes
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
- CVSS 4.0 vector
- 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
- Published
- 2026-05-27
- Last Modified
- 2026-07-23
- NVD status
- Modified
Frequently asked questions
What is CVE-2026-9312?
Is CVE-2026-9312 actively exploited?
What is the CVSS score for CVE-2026-9312?
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Related vulnerabilities
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