CVE-2026-5138: Foreman: foreman: information disclosure via improper validation of nested request parameters

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-01 · updated 2026-07-09
Weakness: CWE-639

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.

Affected products

Red Hat Satellite 6: from 6.16 before 6.16.10; from 6.17 before 6.17.9; from 6.18 before 6.18.7; from 6.19 before 6.19.2 — fixed in 6.16.10, 6.17.9, 6.18.7, 6.19.2
foreman: before 3.18.2; from 3.19.0 before 3.19.1 — fixed in 3.18.2, 3.19.1

How to fix

Upgrade to a fixed version: Red Hat Satellite 6 6.16.10, 6.17.9, 6.18.7, 6.19.2; foreman 3.18.2, 3.19.1. Check the vendor advisory for mitigations.

References

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