Is CVE-2026-5138 actively exploited?

No active exploitation of CVE-2026-5138 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5138 be exploited remotely?

Yes. CVE-2026-5138 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5138?

CVE-2026-5138 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-5138

CWE-639Published: July 1, 2026· Updated: Jul 2, 2026

4.3

CVSS v3.1

EPSS:0.25%probability of exploitation in 30 daysPercentile:15.9th

Official Description

A flaw was found in Foreman. An authenticated user with host-edit permissions could exploit a cross-tenant information disclosure vulnerability. This flaw occurs because the taxonomy_scope controller method does not properly validate organization and location IDs from nested request parameters, bypassing existing authorization checks. This allows the user to leak sensitive infrastructure metadata, including subnet topology, IP ranges, gateways, DNS servers, and VLAN IDs, from organizations and locations they are not authorized to access.

NVD Source

Technical Analysis

CVE-2026-5138 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.