CVE-2026-45617

CVE-2026-45617 affects LiquidJS, where the built‑in strip_html filter in versions 10.25.7 and earlier uses a backtracking regex that causes severe CPU backpressure (ReDoS) on inputs with unclosed [removed], , or

CVE-2026-45617 LiquidJS: ReDoS via Quadratic Backtracking in `strip_html` Filter Regex

LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, the built-in striphtml filter uses a regex containing four flawed lazy-quantified alternatives, leading to ReDoS via quadratic backtracking. When the input contains many script...

CVE-2026-44644

CVE-2026-44644 affects liquidjs versions 10.25.7 and earlier. The strip_html filter uses a regex where the catch‑all branch () does not match line terminators, allowing a newline inside a tag (e.g., ) to bypass sanitization. If applications render attacker-controlled input via {{ x | strip_html }...

Regular Expression Denial of Service (ReDoS)

Overview liquidjs is an A simple, expressive, safe and Shopify compatible template engine in pure JavaScript. Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS through the striphtml filter in the HTML filter implementation. An attacker can block the...

LiquidJS Vulnerable to ReDoS via Quadratic Backtracking in `strip_html` Filter Regex

Summary The built-in striphtml filter in liquidjs uses a regex containing four lazy-quantified alternatives. When the input contains many |||/g, '' The regex contains four lazy patterns: 1. 2. 3. 4. For an input like 'script'.repeatN, the engine encounters N starting positions. At each one it mus...

Cross-site Scripting (XSS)

Overview liquidjs is an A simple, expressive, safe and Shopify compatible template engine in pure JavaScript. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the striphtml filter, which fails to properly remove HTML tags containing newline characters. An attacker...

GHSA-2QV6-9WX5-CWV4 LiquidJS's strip_html filter bypass via newline characters in HTML tags enables XSS

Summary The striphtml filter in liquidjs is intended to remove HTML tags from a string before rendering, and is widely used as an XSS sanitizer. The implementation uses a regex whose catch-all branch does not match line terminators, so any HTML tag containing a \n or \r character passes through...

LiquidJS's strip_html filter bypass via newline characters in HTML tags enables XSS

Summary The striphtml filter in liquidjs is intended to remove HTML tags from a string before rendering, and is widely used as an XSS sanitizer. The implementation uses a regex whose catch-all branch does not match line terminators, so any HTML tag containing a \n or \r character passes through...