CVE-2026-39859

LiquidJS has a renderFile() / parseFile() bypass configured root and allow arbitrary file read

State: Published
Severity: 6.3 Medium
Published: Apr 8, 2026
Updated: Apr 10, 2026
Reserved: Apr 7, 2026

Description

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.25.3, liquidjs 10.25.0 documents root as constraining filenames passed to renderFile() and parseFile(), but top-level file loads do not enforce that boundary. A Liquid instance configured with an empty temporary directory as root can return the contents of arbitrary files. This vulnerability is fixed in 10.25.3.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	GitHub_M
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CISA-ADP

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
liquidjsharttle	< 10.25.3Affected

References

https://github.com/harttle/liquidjs/security/advisories/GHSA-v273-448j-v4qj

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