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CVE-2026-69222— LiquidJS: Uncontrolled Resource Consumption in `join` filter allows template authors to bypass `memoryLimit` and crash the process

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 10.27.2之前版本存在资源管理错误漏洞，该漏洞源于join过滤器根据数组长度和分隔符长度而非实际生成的字符串长度计算复杂度，且concat过滤器可廉价倍增数组引用，导致模板可超出配置的内存限制；array_to_sentence_string过滤器也存在相同问题，特制模板可能耗尽V8字符串或进程内存限制并导致进程崩溃。

CVSS 7.5 · High EPSS 0.37% · P30

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
harttle liquidjs < 10.27.2 affected
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I. Basic Information for CVE-2026-69222

Vulnerability Information
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Vulnerability Title
LiquidJS: Uncontrolled Resource Consumption in `join` filter allows template authors to bypass `memoryLimit` and crash the process
Source: CVE Program / CVE List V5
Vulnerability Description
LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.27.2, the join filter in src/filters/array.ts computes complexity from array.length and separator length instead of the total string length produced by array.join(sep). The concat filter can cheaply double arrays of references, after which join materializes the referenced content while charging only for element count, allowing a template to exceed a configured memoryLimit by a large factor. The sibling array_to_sentence_string filter in src/filters/string.ts has the same accounting defect, and a crafted template can allocate toward V8's string or process memory limit and crash the process. This issue is fixed in version 10.27.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
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 10.27.2之前版本存在资源管理错误漏洞，该漏洞源于join过滤器根据数组长度和分隔符长度而非实际生成的字符串长度计算复杂度，且concat过滤器可廉价倍增数组引用，导致模板可超出配置的内存限制；array_to_sentence_string过滤器也存在相同问题，特制模板可能耗尽V8字符串或进程内存限制并导致进程崩溃。
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 < 10.27.2 -

II. Public POCs for CVE-2026-69222

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8067 chars
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III. Intelligence Information for CVE-2026-69222

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Patches & Fixes for CVE-2026-69222 (2)

Vendor Advisories for CVE-2026-69222 (1)

Vendor Pages for CVE-2026-69222 (1)

IV. Related Vulnerabilities

Same product: liquidjs
Same vendor: harttle
Same weakness: CWE-400

V. Comments for CVE-2026-69222

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