CVE-2026-5135: Foreman: foreman: unauthorized modification of host configurations via broken access control

Severity: medium (CVSS 6.5 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. This broken access control vulnerability allows an authenticated user with host-edit permissions to retarget an existing lookup value override to a different host. This is achieved by modifying the match field through nested host attributes, effectively bypassing authorisation checks. The consequence is the potential for unauthorised modification of managed host configurations across different organisational and location boundaries.

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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