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CVE-2026-39859— LiquidJS has a renderFile() / parseFile() bypass configured root and allow arbitrary file read

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 10.25.3之前版本存在路径遍历漏洞，该漏洞源于根目录限制未强制执行，可能导致返回任意文件内容。

AI Predicted 7.5 Difficulty: Easy EPSS 0.50% · P42

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2026-39859

Vulnerability Information
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Vulnerability Title
LiquidJS has a renderFile() / parseFile() bypass configured root and allow arbitrary file read
Source: CVE Program / CVE List V5
Vulnerability Description
LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.25.3, liquidjs 10.25.0 documents root as constraining filenames passed to renderFile() and parseFile(), but top-level file loads do not enforce that boundary. A Liquid instance configured with an empty temporary directory as root can return the contents of arbitrary files. This vulnerability is fixed in 10.25.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
liquidjs 路径遍历漏洞
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 10.25.3之前版本存在路径遍历漏洞，该漏洞源于根目录限制未强制执行，可能导致返回任意文件内容。
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 < 10.25.3 -

II. Public POCs for CVE-2026-39859

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III. Intelligence Information for CVE-2026-39859

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

CVE-2026-39412 5.3 MEDIUM LiquidJS has an ownPropertyOnly bypass via sort_natural filter — prototype property inform
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

IV. Related Vulnerabilities

Same product: liquidjs
Same vendor: harttle
Same weakness: CWE-22

V. Comments for CVE-2026-39859

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