CVE-2026-96658: Code Injection (CVSS 9.9)

Description

A flaw was found in Foreman. An authenticated attacker with low-level permissions can achieve remote code execution (RCE) by bypassing the safemode sandbox within the templating engine. Due to improper handling of delegated methods, an attacker can append unauthorized functions to the allowed execution list, enabling them to run arbitrary commands on the hosting server.

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CVSS v3.1 Score

9.9

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0069

Probability of exploitation

0.52%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-94 CWE-94

References

Other References

https://access.redhat.com/errata/RHSA-2026:74503 https://access.redhat.com/errata/RHSA-2026:74504 https://access.redhat.com/errata/RHSA-2026:74505 https://access.redhat.com/errata/RHSA-2026:74506 https://access.redhat.com/security/cve/CVE-2026-96658 https://bugzilla.redhat.com/show_bug.cgi?id=2534185 http://www.openwall.com/lists/oss-security/2026/10/07/2

Frequently Asked Questions

What is CVE-2026-96658? +

A flaw was found in Foreman. An authenticated attacker with low-level permissions can achieve remote code execution (RCE) by bypassing the safemode sandbox within the templating engine. Due to improper handling of delegated methods, an attacker can append unauthorized functions to the allowed execution list, enabling them to run arbitrary commands on the hosting server. It has a CVSS v3.1 base score of 9.9 (CRITICAL).

How severe is CVE-2026-96658? +

CVE-2026-96658 has a CVSS v3.1 score of 9.9 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0069, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-96658? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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