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CVE-2026-44645— LiquidJS has a renderLimit DoS guard bypass via empty `{% for %}` body

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.

harttle liquidjs是harttle的嵌入式Web服务器。 harttle liquidjs 10.25.7及之前版本存在安全漏洞，该漏洞源于renderLimit选项可被完全绕过，可能导致低权限模板作者占用事件循环线程，造成拒绝服务攻击。

CVSS 6.5 · Medium EPSS 0.57% · P47

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
harttle liquidjs < 10.26.0 affected
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I. Basic Information for CVE-2026-44645

Vulnerability Information
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Vulnerability Title
LiquidJS has a renderLimit DoS guard bypass via empty `{% for %}` body
Source: CVE Program / CVE List V5
Vulnerability Description
LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, the renderLimit option can be fully bypassed by a {% for %} (or {% tablerow %}) tag whose body is empty. The renderLimit option is documented in docs/source/tutorials/dos.md as the mechanism that "mitigates this by limiting the time consumed by each render() call." The per-iteration time check is reached only when the body contains at least one template node, so a template such as {%- for i in (1..N) -%}{%- endfor -%} iterates the full collection without ever consulting renderLimit. With a configured renderLimit of 50 ms, a single parseAndRenderSync call has been observed to consume 2.26 seconds (~45× over the limit) and scales linearly with N up to memoryLimit, allowing a low-privileged template author to wedge an event-loop thread for an attacker-chosen duration. Deployments that rely on a finite renderLimit for DoS protection (common in multi-tenant template-authoring environments) can still be forced by a single crafted template to monopolize a Node.js event-loop worker for attacker-controlled time, potentially stalling in-flight requests, with availability impact only. This issue has been fixed in version 10.26.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
harttle liquidjs 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
harttle liquidjs是harttle的嵌入式Web服务器。 harttle liquidjs 10.25.7及之前版本存在安全漏洞，该漏洞源于renderLimit选项可被完全绕过，可能导致低权限模板作者占用事件循环线程，造成拒绝服务攻击。
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 -

II. Public POCs for CVE-2026-44645

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III. Intelligence Information for CVE-2026-44645

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Patches & Fixes for CVE-2026-44645 (1)

Vendor Advisories for CVE-2026-44645 (1)

Vendor Pages for CVE-2026-44645 (1)

Same Patch Batch · harttle · 2026-06-17 · 5 CVEs total

CVE-2026-45617 7.5 HIGH LiquidJS: ReDoS via Quadratic Backtracking in `strip_html` Filter Regex
CVE-2026-45357 7.5 HIGH LiquidJS: Memory and render limit bypass via unbounded width padding in `date` filter (str
CVE-2026-44644 6.1 MEDIUM LiquidJS's strip_html filter bypass via newline characters in HTML tags enables XSS
CVE-2026-44646 5.3 MEDIUM LiquidJS: `{% render %}` tag silently bypasses per-render `ownPropertyOnly:true` via `Cont

IV. Related Vulnerabilities

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

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