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

Quick assessment

Affected
harttle liquidjs
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

liquidjs是Jun Yang个人开发者的一个简单、表达、安全且兼容 Shopify 的纯 JavaScript 模板引擎。 LiquidJS 10.25.4之前版本存在信息泄露漏洞，该漏洞源于sort_natural过滤器绕过ownPropertyOnly安全选项，可能导致通过排序侧信道攻击提取原型继承属性的值，造成信息泄露。

CVSS 5.3 · Medium EPSS 0.47% · P40

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-39412

Vulnerability Information
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Vulnerability Title
LiquidJS has an ownPropertyOnly bypass via sort_natural filter — prototype property information disclosure through sorting side-channel
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
liquidjs 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
liquidjs是Jun Yang个人开发者的一个简单、表达、安全且兼容 Shopify 的纯 JavaScript 模板引擎。 LiquidJS 10.25.4之前版本存在信息泄露漏洞，该漏洞源于sort_natural过滤器绕过ownPropertyOnly安全选项，可能导致通过排序侧信道攻击提取原型继承属性的值，造成信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
harttle liquidjs < 10.25.4 -

II. Public POCs for CVE-2026-39412

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III. Intelligence Information for CVE-2026-39412

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Patches & Fixes for CVE-2026-39412 (1)

Vendor Advisories for CVE-2026-39412 (1)

Same Patch Batch · harttle · 2026-04-08 · 4 CVEs total

CVE-2026-34166 3.7 LOW LiquidJS has a Memory Limit Bypass via Quadratic Amplification in `replace` Filter
CVE-2026-35525 LiquidJS has a root restriction bypass for partial and layout loading through symlinked te
CVE-2026-39859 LiquidJS has a renderFile() / parseFile() bypass configured root and allow arbitrary file

IV. Related Vulnerabilities

Same product: liquidjs
Same vendor: harttle
Same weakness: CWE-200

V. Comments for CVE-2026-39412

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