Vulnerability · Published Apr 8, 2026 · Assigned by GitHub_M

CVE-2026-39412LiquidJS has an ownPropertyOnly bypass via sort_natural filter — prototype property information disclosure through sorting side-channel

Medium 5.3

In plain English

A medium-severity information exposure in liquidjs from harttle. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 64.5% 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 10.25.4, the sort_natural filter bypasses the ownPropertyOnly security option, allowing template authors to extract values of prototype-inherited properties through a sorting side-channel attack. Applications relying on ownPropertyOnly: true as a security boundary (e.g., multi-tenant template systems) are exposed to information disclosure of sensitive prototype properties such as API keys and tokens. This vulnerability is fixed in 10.25.4.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	liquidjs	10.25.4	GHSA-rv5g-f82m-qrvv

Affected products (as reported)

Vendor	Product	Versions
harttle	liquidjs	< 10.25.4

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/harttle/liquidjs/security/advisories/GHSA-rv5g-f82m-qrvv x_refsource_CONFIRM
https://github.com/harttle/liquidjs/pull/869 x_refsource_MISC
https://github.com/harttle/liquidjs/commit/e743da0020d34e2ee547e1cc1a86b58377ebe1ce x_refsource_MISC
https://github.com/harttle/liquidjs/releases/tag/v10.25.4 x_refsource_MISC