CVE-2026-34166 - LiquidJS has a Memory Limit Bypass via Quadratic Amplification in `replace` Filter

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MEDIUM

LiquidJS has a Memory Limit Bypass via Quadratic Amplification in `replace` Filter

Published Apr 8, 2026

5.3

MEDIUM

CVSS 3.1

EPSS 0.57%

Description

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. This allows an attacker who controls template content to bypass the memoryLimit DoS protection with approximately 2,500x amplification, potentially causing out-of-memory conditions. This vulnerability is fixed in 10.25.3.

Affected products

Vendor Harttle Product Liquidjs Default
n/a
- Version
  < 10.25.3
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Harttle

Liquidjs

n/a

Version	Status	Constraints
< 10.25.3	affected	-

Ecosystem	Package	Introduced	Fixed
npm	liquidjs	0	10.25.3

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-400

Uncontrolled Resource Consumption

References (5)

https://github.com/advisories/GHSA-mmg9-6m6j-jqqx
Advisory
https://github.com/harttle/liquidjs/commit/abc058be0f33d6372cd2216f4945183167abeb25
x_refsource_MISCPatch
https://github.com/harttle/liquidjs/releases/tag/v10.25.3
x_refsource_MISCRelease Notes
https://github.com/harttle/liquidjs/security/advisories/GHSA-mmg9-6m6j-jqqx
x_refsource_CONFIRMExploitVendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-34166

Link	Providers	Tags
https://github.com/advisories/GHSA-mmg9-6m6j-jqqx		Advisory
https://github.com/harttle/liquidjs/commit/abc058be0f33d6372cd2216f4945183167abeb25		x_refsource_MISCPatch
https://github.com/harttle/liquidjs/releases/tag/v10.25.3		x_refsource_MISCRelease Notes
https://github.com/harttle/liquidjs/security/advisories/GHSA-mmg9-6m6j-jqqx		x_refsource_CONFIRMExploitVendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-34166