Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Liquidjs | Liquidjs | < 10.25.1 |
Related Weaknesses (CWE)
References
- https://github.com/harttle/liquidjs/commit/35d523026345d80458df24c72e653db78b5d0Patch
- https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4vExploitVendor Advisory
- https://github.com/harttle/liquidjs/security/advisories/GHSA-6q5m-63h6-5x4vExploitVendor Advisory
FAQ
What is CVE-2026-33287?
CVE-2026-33287 is a vulnerability with a CVSS score of 7.5 (HIGH). 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()` whic...
How severe is CVE-2026-33287?
CVE-2026-33287 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33287?
Check the references section above for vendor advisories and patch information. Affected products include: Liquidjs Liquidjs.