CVE catalog
CVE-2026-5512
An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to determine the names of private repositories by their numeric ID. The mobile
- Severity
- Medium · CVSS 5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/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
- Source
- [NVD] · [CVE record]
- EPSS
- 0.30% · Oct 25, 2026
An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to determine the names of private repositories by their numeric ID. The mobile upload policy API endpoint did not perform an early authorization check, and validation error messages included the full repository name for repositories the caller did not have access to. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | enterprise_server | Not reported | 3.14.26 | fixed |
| Cpe | enterprise_server | Not reported | 3.15.21 | fixed |
| Cpe | enterprise_server | Not reported | 3.16.17 | fixed |
| Cpe | enterprise_server | Not reported | 3.17.14 | fixed |
| Cpe | enterprise_server | Not reported | 3.18.8 | fixed |
| Cpe | enterprise_server | Not reported | 3.19.5 | fixed |
| Cpe | enterprise_server | Not reported | Not reported | unknown |
| Cpe | enterprise_server | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | enterprise_server | cpe | Not reported | 3.14.26 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.15.21 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.16.17 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.17.14 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.18.8 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.19.5 | Not reported | Not reported | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.26]
- [https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.21]
- [https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.17]
- [https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.14]
- [https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.8]
- [https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.5]
- [https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.1]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-5512]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1231.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)]