Winter: Authenticated Twig sandbox escape in CMS SecurityPolicy (bypass of CVE-2024-54149)

Date Aug 20, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product Composer · winter/wn-system-module
High-risk advisory

Summary

Winter: Authenticated Twig sandbox escape in CMS SecurityPolicy (bypass of CVE-2024-54149)

Why it matters

GitHub has published a reviewed security advisory for winter/wn-system-module. Prioritize it with other application dependency updates.

Operator check

Check whether winter/wn-system-module is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.