Is CVE-2026-5512 actively exploited?

No active exploitation of CVE-2026-5512 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5512 be exploited remotely?

Yes. CVE-2026-5512 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5512?

CVE-2026-5512 has a CVSS score of 5.3 (MEDIUM).

HOME VULNERABILITIESCVE-2026-5512

MEDIUM

CVE-2026-5512

CWE-201Published: April 21, 2026· Updated: Apr 22, 2026

5.3

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:15.5th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-5512 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

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