CVE-2026-34166
LiquidJS has a Memory Limit Bypass via Quadratic Amplification in `replace` Filter
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.
INFO
Published Date :
April 8, 2026, 7:25 p.m.
Last Modified :
April 10, 2026, 9:19 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update LiquidJS to version 10.25.3.
- Ensure memoryLimit protection is properly configured.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34166.
| URL | Resource |
|---|---|
| https://github.com/harttle/liquidjs/commit/abc058be0f33d6372cd2216f4945183167abeb25 | Patch |
| https://github.com/harttle/liquidjs/releases/tag/v10.25.3 | Release Notes |
| https://github.com/harttle/liquidjs/security/advisories/GHSA-mmg9-6m6j-jqqx | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34166 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34166
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34166 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34166 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 10, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CPE Configuration OR *cpe:2.3:a:liquidjs:liquidjs:*:*:*:*:*:node.js:*:* versions up to (excluding) 10.25.3 Added Reference Type GitHub, Inc.: https://github.com/harttle/liquidjs/commit/abc058be0f33d6372cd2216f4945183167abeb25 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/harttle/liquidjs/releases/tag/v10.25.3 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/harttle/liquidjs/security/advisories/GHSA-mmg9-6m6j-jqqx Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
Apr. 08, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-400 Added Reference https://github.com/harttle/liquidjs/commit/abc058be0f33d6372cd2216f4945183167abeb25 Added Reference https://github.com/harttle/liquidjs/releases/tag/v10.25.3 Added Reference https://github.com/harttle/liquidjs/security/advisories/GHSA-mmg9-6m6j-jqqx