Vulnerability · Published Apr 8, 2026 · Assigned by GitHub_M

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

Low 3.7

In plain English

A low-severity uncontrolled resource consumption in liquidjs from harttle. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.5%top 56.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	liquidjs	10.25.3	GHSA-mmg9-6m6j-jqqx

Affected products (as reported)

Vendor	Product	Versions
harttle	liquidjs	< 10.25.3

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

References

https://github.com/harttle/liquidjs/security/advisories/GHSA-mmg9-6m6j-jqqx x_refsource_CONFIRM
https://github.com/harttle/liquidjs/commit/abc058be0f33d6372cd2216f4945183167abeb25 x_refsource_MISC
https://github.com/harttle/liquidjs/releases/tag/v10.25.3 x_refsource_MISC