CVE-2026-41311: liquidjs has a Denial of Service via circular block reference in layout

April 24, 2026

A circular block reference in {% layout %} / {% block %} causes an infinite recursive loop, consuming all available memory (~4GB) and crashing the Node.js process with FATAL ERROR: JavaScript heap out of memory. This allows any user who can submit a Liquid template to perform a Denial of Service attack.

References

github.com/advisories/GHSA-4rc3-7j7w-m548
github.com/harttle/liquidjs
github.com/harttle/liquidjs/commit/e2311dfd6e82f73509308aa8a3a1fafc92e226f0
github.com/harttle/liquidjs/security/advisories/GHSA-4rc3-7j7w-m548
nvd.nist.gov/vuln/detail/CVE-2026-41311

Code Behaviors & Features

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