CVE-2026-45617
LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | liquidjs | < 10.26.0 | 10.26.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-r7g9-xpmj-5fcq
- https://github.com/harttle/liquidjs/security/advisories/GHSA-r7g9-xpmj-5fcq
- https://github.com/harttle/liquidjs/releases/tag/v10.26.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-45617
- https://github.com/harttle/liquidjs/commit/3616a744b9abeb425c217b340a2397d46176afb8