CVE-2026-33287
LiquidJS has Exponential Memory Amplification through its replace_first Filter $& Pattern
Description
LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to version 10.25.1, the `replace_first` filter in LiquidJS uses JavaScript's `String.prototype.replace()` which interprets `$&` 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.
INFO
Published Date :
March 26, 2026, 1:16 a.m.
Last Modified :
March 30, 2026, 4:46 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update LiquidJS to version 10.25.1 or later.
- Monitor application memory usage.
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-2026-33287.
| URL | Resource |
|---|---|
| https://github.com/harttle/liquidjs/commit/35d523026345d80458df24c72e653db78b5d061d | Patch |
| https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4v | Exploit Vendor Advisory |
| https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4v | 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-2026-33287 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-2026-33287
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-2026-33287 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33287 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]
Mar. 30, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:liquidjs:liquidjs:*:*:*:*:*:node.js:*:* versions up to (excluding) 10.25.1 Added Reference Type GitHub, Inc.: https://github.com/harttle/liquidjs/commit/35d523026345d80458df24c72e653db78b5d061d Types: Patch Added Reference Type GitHub, Inc.: https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4v Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4v Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 26, 2026
Action Type Old Value New Value Added Reference https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4v -
New CVE Received by [email protected]
Mar. 26, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-20 Added CWE CWE-400 Added Reference https://github.com/harttle/liquidjs/commit/35d523026345d80458df24c72e653db78b5d061d Added Reference https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4v