CVE-2026-33287

HIGH

7.5

Description

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to version 10.25.1, the `replace_first` filter in LiquidJS uses JavaScript's `String.prototype.replace()` which interprets `$&` as a back reference to the matched substring. The filter only charges `memoryLimit` for the input string length, not the amplified output. An attacker can achieve exponential memory amplification (up to 625,000:1) while staying within the `memoryLimit` budget, leading to denial of service. Version 10.25.1 patches the issue.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/26/2026

Last Modified3/30/2026

Sourcenvd

Honeypot Sightings0

Affected Products

liquidjs:liquidjs

Weaknesses (CWE)

CWE-20CWE-400

References

https://github.com/harttle/liquidjs/commit/35d523026345d80458df24c72e653db78b5d061d(security-advisories@github.com)

https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4v(security-advisories@github.com)

https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4v(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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