Bug 2452230 (CVE-2026-5135)

Summary: CVE-2026-5135 foreman: Foreman: Unauthorized modification of host configurations via broken access control
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: anthomas, ehelms, ggainey, jpasqual, juwatts, mhulan, nmoumoul, osousa, pcreech, rchan, security-response-team, smallamp, tmalecek
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
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.
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Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Deadline: 2026-04-15   

Description OSIDB Bzimport 2026-03-27 13:27:36 UTC 
A broken access control flaw was found in Foreman. This flaw allows an authenticated user with host-edit permissions to retarget an existing lookup value override to a different host by modifying the match field via nested host attributes, bypassing authorization checks. The injected values are served by the ENC/classification pipeline to configuration management tools, potentially resulting in unauthorized modification of managed host configurations across organization and location boundaries.

Authenticated Foreman account with edit rights on at least one host (edit_hosts permission). The attacker needs two requests: first to create a legitimate override on their own host, then to retarget its match field to the victim host's FQDN. A lookup key with fqdn in its path must exist.
Comment 2 errata-xmlrpc 2026-07-01 17:27:22 UTC 
This issue has been addressed in the following products:

  Red Hat Satellite 6.17 for RHEL 9

Via RHSA-2026:34366 https://access.redhat.com/errata/RHSA-2026:34366
Comment 3 errata-xmlrpc 2026-07-01 17:28:36 UTC 
This issue has been addressed in the following products:

  Red Hat Satellite 6.18 for RHEL 9

Via RHSA-2026:34368 https://access.redhat.com/errata/RHSA-2026:34368
Comment 4 errata-xmlrpc 2026-07-01 17:29:12 UTC 
This issue has been addressed in the following products:

  Red Hat Satellite 6.16 for RHEL 8
  Red Hat Satellite 6.16 for RHEL 9

Via RHSA-2026:34367 https://access.redhat.com/errata/RHSA-2026:34367