CVE-2026-45617
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk30th percentile — higher than 30% of all known CVEs
Summary
LiquidJS is a Shopify/GitHub Pages compatible template engine that in versions 10.25.7 and below contains a flawed regex in the strip_html filter. This leads to ReDoS attacks via quadratic backtracking, blocking the Node.js event loop.
Risk Assessment
An attacker can send specially crafted input, leading to severe event-loop blocking and CPU amplification, which can affect application performance and service availability.
Recommendation
It is recommended to upgrade to version 10.26.0 or later to eliminate this vulnerability and secure the application against potential attacks.
Original NVD description (English source)
LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, the built-in strip_html filter uses a regex containing four flawed lazy-quantified alternatives, leading to ReDoS via quadratic backtracking. When the input contains many <script, <style, or <!-- opener tokens without matching closers, the V8 regex engine performs O(N²) backtracking, blocking the Node.js event loop. A single ~350 KB request ('<script'.repeat(50000)) stalls the process for ~10 seconds; cost grows quadratically with input size. The default memoryLimit: Infinity does not bound regex CPU, and even when configured strip_html only charges str.length to the limit — the regex itself runs unbounded. A single unauthenticated request containing crafted untrusted input can cause severe event-loop blocking and CPU amplification that saturates Node.js workers while bypassing memoryLimit protections. This issue has been fixed in version 10.26.0.