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

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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.

Source published

8 Apr 2026 19:45:21 UTC

Source modified

10 Apr 2026 20:45:55 UTC

Saved here

23 Oct 2026 15:48:27 UTC

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CVE Program Terms of Use

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CVSS 4.0 · 6.3 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

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.

Source published

Apr 8, 2026, 7:45:21 PM (timezone not stated)

Source modified

Apr 10, 2026, 8:45:55 PM (timezone not stated)

Saved here

15 Nov 2026 11:06:44 UTC

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ENISA EUVD · source terms and attribution apply

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EUVD CVSS 4.0 · 6.3 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

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.

Source published

8 Apr 2026 20:16:26 UTC

Source modified

24 Jul 2026 21:10:00 UTC

Saved here

25 Oct 2026 09:17:24 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

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Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · [email protected] · Secondary · 6.3 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

`liquidjs` 10.25.0 documents `root` as constraining filenames passed to `renderFile()` and `parseFile()`, but top-level file loads do not enforce that boundary. The published npm package `[email protected]` on Linux 6.17.0 with Node v22.22.1. A `Liquid` instance configured with an empty temporary directory as `root` still returned the contents of `/etc/hosts` when `renderFile('/etc/hosts')` was called. I have not exhaustively checked older releases yet; 10.25.0 is the latest tested version. Root cause: - `src/parser/parser.ts:83-85` calls `loader.lookup(file, LookupType.Root, ...)` and then reads the returned file. - `src/fs/loader.ts:38` passes `type !== LookupType.Root` into `candidates()`. - For `LookupType.Root`, `enforceRoot` is false, so `src/fs/loader.ts:47-66` accepts resolved absolute paths and fallback results without any `contains()` check. This appears adjacent to the March 10, 2026 fix for CVE-2026-30952, which hardened `include` / `render` / `layout` but not the top-level file-loading APIs. Proof of concept: ```javascript const fs = require('fs'); const os = require('os'); const path = require('path'); const { Liquid } = require('liquidjs'); const safeRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'liquidjs-safe-root-')); const engine = new Liquid({ root: [safeRoot], extname: '.liquid' }); engine.renderFile('/etc/hosts').then(console.log); ``` Expected result: a path outside `root` should be rejected. Actual result: `/etc/hosts` is rendered successfully. Impact: any application that treats `root` as a sandbox boundary and forwards attacker-controlled template names into `renderFile()` or `parseFile()` can disclose arbitrary local files readable by the server process. Suggested fix: apply the same containment checks used for partial/layout lookups to `LookupType.Root`, and reject absolute or fallback paths unless they remain within an allowed root. A regression test should verify that `renderFile('/etc/hosts')` fails when `root` points to an unrelated directory.

Source published

8 Apr 2026 15:04:44 UTC

Source modified

10 Sep 2026 03:50:44 UTC

Saved here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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CVSS_V4 · 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

Publisher rating · MODERATE