{"id":"CVE-2026-45617","revision":"2722b3316c284643a0bab4e72dad4f39","records":[{"revision":"2722b3316c284643a0bab4e72dad4f39","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-45617","aliases":[],"title":"LiquidJS: ReDoS via Quadratic Backtracking in `strip_html` Filter Regex","description":"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.","state":0,"publishedAt":"2026-06-17T22:14:38.396+00:00","modifiedAt":"2026-06-18T15:46:28.241+00:00","affected":[{"ecosystem":"Vendor product","name":"liquidjs","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"harttle\",\n                    \"product\": \"liquidjs\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 10.26.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/harttle/liquidjs/security/advisories/GHSA-r7g9-xpmj-5fcq","https://github.com/harttle/liquidjs/commit/3616a744b9abeb425c217b340a2397d46176afb8","https://github.com/harttle/liquidjs/releases/tag/v10.26.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-45617","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-45617","identifiers":["CVE-2026-45617"]},"retained":false,"historicalAffected":[]}],"coverage":[]}