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

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.

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-2026-5138 is rated Low Risk (22.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.25%). 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-2026-5138

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 2026-07-02 — 0.25% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-5138

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]

Weakness enumeration for CVE-2026-5138

GitHub Security Advisory for CVE-2026-5138

GHSA-47r2-h2mh-qqjp · Severity: medium — A flaw was found in Foreman. An authenticated user with host-edit permissions could exploit a...

OS Trackers for CVE-2026-5138

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2026-5138

Affected software / configurations for CVE-2026-5138

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-2026-5138

cvelogic Threat Intelligence