CVE-2026-107360 (CVSS 9.6)

Description

A flaw was found in rubygem-safemode. Compound assignment expressions in sandboxed code are evaluated without mediating method calls through the Jail allow-list. An authenticated attacker who can supply template content can invoke arbitrary no-argument methods on objects exposed to the template renderer without Jail mediation, including destructive operations such as host deletion and disclosure of non-allow-listed object state.

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CVSS v3.1 Score

9.6

CRITICAL

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

Weakness Type (CWE)

CWE-183 CWE-183

References

Other References

https://access.redhat.com/errata/RHSA-2026:99949 https://access.redhat.com/errata/RHSA-2026:99950 https://access.redhat.com/errata/RHSA-2026:99952 https://access.redhat.com/security/cve/CVE-2026-107360 https://bugzilla.redhat.com/show_bug.cgi?id=2547645

Frequently Asked Questions

What is CVE-2026-107360? +

A flaw was found in rubygem-safemode. Compound assignment expressions in sandboxed code are evaluated without mediating method calls through the Jail allow-list. An authenticated attacker who can supply template content can invoke arbitrary no-argument methods on objects exposed to the template renderer without Jail mediation, including destructive operations such as host deletion and disclosure of non-allow-listed object state. It has a CVSS v3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2026-107360? +

CVE-2026-107360 has a CVSS v3.1 score of 9.6 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

How do I check if I'm vulnerable to CVE-2026-107360? +

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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