amp;` as a back reference to the matched substring. The filter only charges `memoryLimit" /> amp;` as a back reference to the matched substring. The filter only charges `memoryLimit" /> amp;` as a back reference to the matched substring. The filter only charges `memoryLimit" />

VULNERABILITY INTELLIGENCE

CVE-2026-33287

CVSS score7.5 HIGH
EPSS probability0.48%
CISA KEVNot currently listed
Published2026-03-26
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 `

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amp;` 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.

Weakness classification

  • security-advisories@github.com: CWE-20

Primary references