CVE-2026-22692 Octobercms CVE debrief

Who should care

Defenders responsible for October CMS installations, particularly those with CMS_SAFE_MODE enabled, should assess exposure and apply patches or workarounds. This includes administrators, security teams, and vulnerability management teams. They should verify if the installation is affected, review the official advisory, and plan for vendor-supported updates or mitigations.

Why it matters

Defenders should care about CVE-2026-22692 because it allows authenticated users with template editing permissions to bypass sandbox protections in October CMS, potentially leading to unauthorized access or privilege elevation when CMS_SAFE_MODE is enabled.

• Potential unauthorized access to sensitive data or functionality
• Possible elevation of privileges for authenticated users
• Required verification of exposure and patch application
• Need for restricting template editing permissions

Technical summary

The October CMS Twig safe mode feature contains a sandbox bypass vulnerability in versions prior to 3.7.13 and 4.1.5. Authenticated users with template editing permissions can exploit this issue when CMS_SAFE_MODE is enabled. The vulnerability allows attackers to bypass sandbox protections, potentially leading to unauthorized access or privilege elevation. The issue has been fixed in versions 3.7.13 and 4.1.5. To workaround this issue, users can disable CMS_SAFE_MODE if untrusted template editing is not required, and restrict CMS template editing permissions to fully trusted administrators only.

Defensive priority

Defenders should prioritize verifying exposure and applying patches, restricting template editing permissions, and disabling CMS_SAFE_MODE if not required.

Recommended defensive actions

• Verify exposure by checking if CMS_SAFE_MODE is enabled and if template editing permissions are granted to untrusted users.
• Apply patches by upgrading to October CMS versions 3.7.13 or 4.1.5.
• Restrict template editing permissions to fully trusted administrators only.
• Disable CMS_SAFE_MODE if untrusted template editing is not required.
• 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, affected versions, and fixed versions. A vendor advisory is also available. The vulnerability has a CVSS score of 4.9 and a severity of MEDIUM. The CVE record was published on 2026-04-14T17:16:28.423Z and has not been modified since then. Additional information can be found in the official CVE Program record and the NIST NVD detail page.

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.