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

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.

Published: 2026-07-01 Last update: 2026-07-08 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-5135 is rated Low Risk (31.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.24%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-5135

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-07-09 0.26% 0.24% -0.02%
2 2026-07-02 — 0.26% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-5135

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2026-5135

GitHub Security Advisory for CVE-2026-5135

GHSA-vpj3-792h-v855 · Severity: medium — A flaw was found in Foreman. This broken access control vulnerability allows an authenticated...

Affected software / configurations for CVE-2026-5135

Vendor Product Version Raw CPE
redhat satellite >= 6.16, < 6.16.10 cpe:2.3:a:redhat:satellite:*:*:*:*:*:*:*:*
redhat satellite >= 6.17, < 6.17.9 cpe:2.3:a:redhat:satellite:*:*:*:*:*:*:*:*
redhat satellite >= 6.18, < 6.18.7 cpe:2.3:a:redhat:satellite:*:*:*:*:*:*:*:*
redhat satellite >= 6.19, < 6.19.2 cpe:2.3:a:redhat:satellite:*:*:*:*:*:*:*:*
theforeman foreman < 3.18.2 cpe:2.3:a:theforeman:foreman:*:*:*:*:*:*:*:*
theforeman foreman >= 3.19.0, < 3.19.1 cpe:2.3:a:theforeman:foreman:*:*:*:*:*:*:*:*

References for CVE-2026-5135

cvelogic Threat Intelligence