CVE-2026-34166: LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript

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LOW 3.7REMOTEUPGRADE

CVE-2026-34166 is a low-severity flaw (CVSS 3.7) 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, the replace filter in LiquidJS incorrectly accounts for memory usage when the memoryLimit option is enabled. It charges str.length + pattern.length + replacement.length bytes to the memory limiter, but the actual output from str.split(pattern).join(replacement) can be quadratically larger when the pattern occurs many times in the input string. Th

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-400
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 19:25 UTCPublished CVE record published
2026-07-24 22:10 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-2026-34166?

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

Is CVE-2026-34166 being exploited?

CVE-2026-34166 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-2026-34166 affect?

CVE-2026-34166 affects liquidjs. Severity is low (CVSS 3.7). LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.25.3, the replace filter in LiquidJS incorrectly accounts for memory usage when the memoryLimit option is enabled. It charges str.length + patte

How urgent is CVE-2026-34166?

Priority 34/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities · Shopify vulnerabilities

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References

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