liquidjs has a path traversal fallback vulnerability

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liquidjs is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.25.0, the layout, render, and include tags allow arbitrary file access via absolute paths (either as string literals or through Liquid variables, the latter require dynamicPartials: true, which is the default). This poses a security risk when malicious users are allowed to control the template content or specify the filepath to be included as a Liquid variable. This vulnerability is fixed in 10.25.0.

Source published

10 Mar 2026 20:25:20 UTC

Source modified

11 Mar 2026 14:39:22 UTC

Saved here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

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CVSS 4.0 · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

liquidjs is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.25.0, the layout, render, and include tags allow arbitrary file access via absolute paths (either as string literals or through Liquid variables, the latter require dynamicPartials: true, which is the default). This poses a security risk when malicious users are allowed to control the template content or specify the filepath to be included as a Liquid variable. This vulnerability is fixed in 10.25.0.

Source published

Mar 10, 2026, 8:25:20 PM (timezone not stated)

Source modified

Mar 11, 2026, 2:39:22 PM (timezone not stated)

Saved here

15 Nov 2026 09:31:03 UTC

Source terms

ENISA EUVD · source terms and attribution apply

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EUVD CVSS 4.0 · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

liquidjs is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.25.0, the layout, render, and include tags allow arbitrary file access via absolute paths (either as string literals or through Liquid variables, the latter require dynamicPartials: true, which is the default). This poses a security risk when malicious users are allowed to control the template content or specify the filepath to be included as a Liquid variable. This vulnerability is fixed in 10.25.0.

Source published

10 Mar 2026 21:16:48 UTC

Source modified

17 Jun 2026 10:33:12 UTC

Saved here

25 Oct 2026 07:19:14 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

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CVSS 4.0 · [email protected] · Secondary · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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 · [email protected] · Primary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

### Impact The `layout`, `render`, and `include` tags allow arbitrary file access via absolute paths (either as string literals or through Liquid variables, the latter require `dynamicPartials: true`, which is the default). This poses a security risk when malicious users are allowed to control the template content or specify the filepath to be included as a Liquid variable. ### Patches The root cause is LiquidJS allows `require.resolve()` as fallback but doesn't limit the directories it can resolve to. The issue is fixed via [#855](https://github.com/harttle/liquidjs/pull/855) and published version 10.25.0 on npm. ### Workarounds #### Change the files in build time In build time, through Shell script or Webpack `string-replace-loader`, change the file content of correxponding file (depending on your package `type`, for CommonJS it's `dist/liquid.node.js`) under `dist/`, ```diff if (fs.fallback !== undefined) { const filepath = fs.fallback(file) - if (filepath !== undefined) yield filepath + if (filepath !== undefined) { + for (const dir of dirs) { + if (!enforceRoot || this.contains(dir, filepath)) { + yield filepath + break + } + } } } ``` #### Overriding by `fs` LiquidJS option Adding a [`fs` option](https://liquidjs.com/api/interfaces/FS.html) to override the [default `fs` implementation](https://github.com/harttle/liquidjs/blob/1b85fdaa9c535021f7030a239a64003af26d31b5/src/fs/fs-impl.ts#L36-L40): ```javascript const { statSync, readFileSync, promises: { stat, readFile } } = require('fs') const { resolve, extname, dirname, sep } = require('path') const fs = { exists: async (fp) => { try { await stat(fp); return true; } catch { return false } }, existsSync: (fp) => { try { statSync(fp); return true } catch { return false } }, resolve: (root, file, ext) => resolve(root, file + (extname(file) ? '' : ext)), contains: (root, file) => { const r = resolve(root) return file.startsWith(r.endsWith(sep) ? r : r + sep) }, readFile: (fp) => readFile(fp, 'utf8'), readFileSync: (fp) => readFileSync(fp, 'utf8'), fallback: () => undefined, dirname, sep }; const engine = new Liquid({ fs }) ``` ### References Discussions: https://github.com/harttle/liquidjs/pull/851 Code fix: https://github.com/harttle/liquidjs/pull/855

Source published

10 Mar 2026 01:04:34 UTC

Source modified

10 Sep 2026 03:50:41 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:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Publisher rating · HIGH