CVE-2026-5512
published 2026-04-21CVE-2026-5512: An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to determine the names of private…
PriorityP425medium4.3CVSS 3.1
AVNACLPRLUINSUCLINAN
EPSS
0.30%
21.2th percentile
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.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github | enterprise_server | < 3.14.26 | 3.14.26 |
| github | enterprise_server | — | — |
| github | enterprise_server | 3.14.0 – 3.14.25 | — |
| github | enterprise_server | >= 3.15.0 < 3.15.21 | 3.15.21 |
| github | enterprise_server | 3.15.0 – 3.15.20 | — |
| github | enterprise_server | >= 3.16.0 < 3.16.17 | 3.16.17 |
| github | enterprise_server | 3.16.0 – 3.16.16 | — |
| github | enterprise_server | >= 3.17.0 < 3.17.14 | 3.17.14 |
| github | enterprise_server | 3.17.0 – 3.17.13 | — |
| github | enterprise_server | >= 3.18.0 < 3.18.8 | 3.18.8 |
| github | enterprise_server | 3.18.0 – 3.18.7 | — |
| github | enterprise_server | >= 3.19.0 < 3.19.5 | 3.19.5 |
| github | enterprise_server | 3.19.0 – 3.19.4 | — |
| github | enterprise_server | >= 3.20.0 < 3.20.1 | 3.20.1 |
CVSS provenance
nvdv3.14.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
nvdv4.05.3MEDIUMCVSS: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
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-28fv-vpxc-gmp4: An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to determine the names of pr
ghsa_unreviewed·2026-04-22
CVE-2026-5512 [MEDIUM] CWE-201 GHSA-28fv-vpxc-gmp4: An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to determine the names of pr
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.
Citrix
Citrix Security Bulletin CTX135777
vendor_citrix·CVSS 3.2
CVE-2012-5512 [LOW] Citrix Security Bulletin CTX135777
Citrix Security Bulletin CTX135777
CVE References: CVE-2012-5512, CVE-2025-12101, CVE-2025-62626, CVE-2026-23554, CVE-2026-3055, CVE-2026-4368, CVE-2026-4397
Affected Products: Citrix ADM, Citrix Hypervisor, Citrix Virtual Apps and Desktops, Endpoint Management, NetScaler ADC, NetScaler Gateway, XenServer
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://docs.github.com/en/[email protected]/admin/release-notes#3.14.26https://docs.github.com/en/[email protected]/admin/release-notes#3.15.21https://docs.github.com/en/[email protected]/admin/release-notes#3.16.17https://docs.github.com/en/[email protected]/admin/release-notes#3.17.14https://docs.github.com/en/[email protected]/admin/release-notes#3.18.8https://docs.github.com/en/[email protected]/admin/release-notes#3.19.5https://docs.github.com/en/[email protected]/admin/release-notes#3.20.1
2026-04-21
Published