CVE-2026-96658 Red Hat CVE debrief

Who should care

Defenders responsible for Foreman instances, especially those with untrusted authenticated users, should assess exposure and prioritize patching or mitigation. Security teams and vulnerability management teams should also be aware of the potential risks and take appropriate actions to protect their environments. Additionally, operators and administrators of Foreman instances should be aware of the vulnerability and take steps to verify exposure and apply

Why it matters

This vulnerability allows an authenticated remote attacker with low-level read permissions to achieve arbitrary code execution on the underlying server, posing a significant risk to Foreman instances with untrusted authenticated users.

• Verify exposure of Foreman instances to untrusted authenticated users
• Apply patches or mitigations to prevent arbitrary code execution
• Monitor Foreman instances for suspicious activity
• Assess the impact of potential code execution on the underlying server

Technical summary

The vulnerability allows an authenticated remote attacker with low-level read permissions to achieve arbitrary code execution on the underlying server by manipulating the permitted methods list within the template rendering engine. This flaw in Foreman could be particularly dangerous for organizations using the software in environments with untrusted authenticated users, as it could allow attackers to bypass the safemode sandbox isolation and execute unauthorized commands directly on the host system. The technical impact includes potential code execution, which could lead to unauthorized access, data breaches, or further malicious activities.

Defensive priority

Defenders should prioritize verifying exposure of Foreman instances, especially those with untrusted authenticated users, and apply patches or mitigations as available.

Recommended defensive actions

• Verify exposure of Foreman instances, especially those with untrusted authenticated users
• Apply patches or mitigations as available from the vendor
• Monitor Foreman instances for suspicious activity
• Assess the impact of potential code execution on the underlying server
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 8.8 and the CWE-94 weakness. Vendor advisories are available from Red Hat. Additional information from open-source intelligence and security researchers indicates that this flaw in Foreman could be particularly dangerous for organizations using the software in environments with untrusted authenticated users. Defenders should verify the exposure of Foreman instances, especially those with untrusted authenticated users, and assess the impact.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.