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CVE-2026-22692 is a sandbox bypass vulnerability in October CMS / October Rain affecting versions prior to 3.7.13 and versions 4.0.0 through 4.1.4. The flaw exists in the optional Twig safe mode feature controlled by CMS_SAFE_MODE. Certain methods exposed through the collect() helper were not properly restricted by the sandbox policy, allowing an authenticated backend user with CMS template editing permissions to escape intended Twig sandbox limitations. As a result, a user who is expected to be constrained by safe mode can perform template operations outside the intended sandbox protections.
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CMS_SAFE_MODE is enabled. This undermines the security boundary intended to safely permit untrusted or less-trusted template editing. The practical impact is unauthorized capability within the templating context, which may enable execution of otherwise restricted template logic and compromise of application integrity within the CMS rendering environment.If you can’t patch tonight, do this now.
CMS_SAFE_MODE where untrusted template editing is not required. Additionally, restrict backend CMS template editing permissions to fully trusted administrators only, since exploitation requires authenticated access and template editing capability.Patch, then assume compromise.
collect() helper methods in Twig safe mode.No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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No public activity observed for this vulnerability.
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