{"id":"CVE-2026-44645","aliases":["GHSA-8xx9-69p8-7jp3"],"url":"https://o3.security/vulnerability/CVE-2026-44645","summary":"LiquidJS has a renderLimit DoS guard bypass via empty `{% for %}` body","details":"LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, the renderLimit option can be fully bypassed by a {% for %} (or {% tablerow %}) tag whose body is empty. The renderLimit option is documented in docs/source/tutorials/dos.md as the mechanism that \"mitigates this by limiting the time consumed by each render() call.\" The per-iteration time check is reached only when the body contains at least one template node, so a template such as {%- for i in (1..N) -%}{%- endfor -%} iterates the full collection without ever consulting renderLimit. With a configured renderLimit of 50 ms, a single parseAndRenderSync call has been observed to consume 2.26 seconds (~45× over the limit) and scales linearly with N up to memoryLimit, allowing a low-privileged template author to wedge an event-loop thread for an attacker-chosen duration. Deployments that rely on a finite renderLimit for DoS protection (common in multi-tenant template-authoring environments) can still be forced by a single crafted template to monopolize a Node.js event-loop worker for attacker-controlled time, potentially stalling in-flight requests, with availability impact only. This issue has been fixed in version 10.26.0.","published":"2026-06-17T22:08:19.354Z","modified":"2026-08-12T03:51:23.140200900Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.00317,"percentile":0.24591,"asOf":"2026-08-19"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"liquidjs","fixedVersion":null}],"fix":{"url":"https://github.com/harttle/liquidjs/commit/5b9c3469085e01c79e2d0af28e2a13f730e1793d","label":"harttle/liquidjs@5b9c346"},"references":[{"type":"WEB","url":"https://github.com/harttle/liquidjs/releases/tag/v10.26.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44645.json"},{"type":"ADVISORY","url":"https://github.com/harttle/liquidjs/security/advisories/GHSA-8xx9-69p8-7jp3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44645"},{"type":"FIX","url":"https://github.com/harttle/liquidjs/commit/5b9c3469085e01c79e2d0af28e2a13f730e1793d"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:23.140200900Z"}}