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CVE-2026-61556— LiquidJS: An infinite loop vulnerability in `strip_html` filter

Quick assessment

Affected
harttle liquidjs
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Yang Jun LiquidJS是美国Yang Jun个人开发者的一款模板引擎。 Yang Jun LiquidJS 10.26.0至10.27.1之前版本存在资源管理错误漏洞，该漏洞源于src/filters/html.ts中的strip_html过滤器在处理包含'<'、至少一个前置字符且没有后续'>'的输入字符串时进入无限循环，可能导致拒绝服务。

CVSS 8.7 · High EPSS 0.32% · P24

Affected Version Matrix 1

VendorProduct Version RangeStatus
harttle liquidjs >= 10.26.0, < 10.27.1 affected
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I. Basic Information for CVE-2026-61556

Vulnerability Information
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Vulnerability Title
LiquidJS: An infinite loop vulnerability in `strip_html` filter
Source: CVE Program / CVE List V5
Vulnerability Description
LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. From 10.26.0 until 10.27.1, the strip_html filter in src/filters/html.ts can enter an infinite loop when an input string contains <, includes at least one preceding character, and has no later >. In strip_html, the search for the next opener advances lt while the loop index remains unchanged when the closer search returns -1, and the equality-only stall guard does not exit because the loop index is less than lt. Reprocessing the same state indefinitely blocks template rendering and can cause denial of service with an input as short as a<. This issue is fixed in version 10.27.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
Vulnerability Title
Yang Jun LiquidJS 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Yang Jun LiquidJS是美国Yang Jun个人开发者的一款模板引擎。 Yang Jun LiquidJS 10.26.0至10.27.1之前版本存在资源管理错误漏洞，该漏洞源于src/filters/html.ts中的strip_html过滤器在处理包含'<'、至少一个前置字符且没有后续'>'的输入字符串时进入无限循环，可能导致拒绝服务。
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 >= 10.26.0, < 10.27.1 -

II. Public POCs for CVE-2026-61556

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6948 chars
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III. Intelligence Information for CVE-2026-61556

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Patches & Fixes for CVE-2026-61556 (2)

Vendor Advisories for CVE-2026-61556 (1)

Vendor Pages for CVE-2026-61556 (1)

IV. Related Vulnerabilities

Same product: liquidjs
Same vendor: harttle
Same weakness: CWE-835

V. Comments for CVE-2026-61556

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