CVE-2026-39859: LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript

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HIGH 7.5REMOTEUPGRADE

CVE-2026-39859 is a high-severity flaw (CVSS 7.5) affecting liquidjs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-04-08
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: liquidjs

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 20:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

liquidjs liquidjs UPGRADE

Affected: < 10.25.3

Fixed in: 10.25.3

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls liquidjs

2. UPGRADE to 10.25.3

npm install liquidjs@">=10.25.3"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-39859?

liquidjs: upgrade to 10.25.3. Exact commands for each OS are on this page.

Is CVE-2026-39859 being exploited?

CVE-2026-39859 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-39859 affect?

CVE-2026-39859 affects liquidjs. Severity is high (CVSS 7.5). 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

How urgent is CVE-2026-39859?

Priority 41/100. High severity; Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities · Shopify vulnerabilities

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CVE-2026-34166 LOW 3.7 UPGRADE LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript
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CVE-2026-39412 MEDIUM 5.3 UPGRADE LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript
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References

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