CVE-2026-33287

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to version 10.25.1, the `replace_first` filter in LiquidJS uses JavaScript's `String.prototype.replace()` which interprets `$&` as a back reference to the matched substring. The filter only charges `memoryLimit` for the input string length, not the amplified output. An attacker can achieve exponential memory amplification (up to 625,000:1) while staying within the `memoryLimit` budget, leading to denial of service. Version 10.25.1 patches the issue.

• CWE-20
• CWE-400

• https://github.com/harttle/liquidjs/commit/35d523026345d80458df24c72e653db78b5d061dPatch
• https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4vExploit, Vendor Advisory
• https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4vExploit, Vendor Advisory

Published

Mar 26, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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