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Vulnerability record · CVE-2026-69222 · published 19 August 2026

CVE-2026-69222: Uncontrolled resource consumption vulnerability

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.27.2, the join filter in src/filters/array.ts computes complexity from array.length and separator length instead of the total string length produced by array.join(sep). The concat filter can cheaply double arrays of references, after which join materializes the referenced content while charging only for element count, allowing a template to exceed a configured memoryLimit by a large factor. The sibling array_to_sentence_string filter in src/filters/string.ts has the same accounting defect, and a crafted template can allocate toward V8's string or process memory limit and crash the process. This issue is fixed in version 10.27.2.

7.5 CVSS 3.1 High EPSS 0.63% · top 51.9% CWE-400 · Uncontrolled resource consumption Awaiting Analysis
7.5CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
9 Sep 2026Last modified by NVD

Description

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.27.2, the join filter in src/filters/array.ts computes complexity from array.length and separator length instead of the total string length produced by array.join(sep). The concat filter can cheaply double arrays of references, after which join materializes the referenced content while charging only for element count, allowing a template to exceed a configured memoryLimit by a large factor. The sibling array_to_sentence_string filter in src/filters/string.ts has the same accounting defect, and a crafted template can allocate toward V8's string or process memory limit and crash the process. This issue is fixed in version 10.27.2.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

LinkTags
https://github.com/harttle/liquidjs/commit/7ab49f999ac045ec1e87f3a7a9fd68dd9e8602b3
https://github.com/harttle/liquidjs/pull/925
https://github.com/harttle/liquidjs/releases/tag/v10.27.2
https://github.com/harttle/liquidjs/security/advisories/GHSA-4r6h-5v86-94p3

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Source: NIST National Vulnerability Database (record CVE-2026-69222), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.