CVE-2026-30952 — liquidjs
Fix: harttle/liquidjs@3cd024dCVE-2026-30952 is a Path Traversal vulnerability in liquidjs. A fix is available for liquidjs — see the affected versions and patch details below.
liquidjs has a path traversal fallback vulnerability
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-30952.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
liquidjsnpmDescription
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 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/,
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 to override the default fs implementation:
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
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | liquidjs | all versions | 10.25.0npm install liquidjs@10.25.0 |
Affected Products
liquidjsliquidjsDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for liquidjs, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update liquidjs to 10.25.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-30952 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.
Frequently Asked Questions
Is CVE-2026-30952 in your dependencies?
Find it across npm, including transitive dependencies.