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CVE-2026-56264— Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint

Quick assessment

Affected
Crawl4AI Crawl4AI
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.

UncleCode Crawl4AI是新加坡UncleCode个人开发者的一款AI驱动的爬虫软件。 UncleCode Crawl4AI 0.8.7之前版本存在代码注入漏洞，该漏洞源于Docker API服务器的/execute_js端点接受并执行攻击者提供的任意JavaScript，且浏览器启用了--disable-web-security，可能导致攻击者执行任意JavaScript并结合浏览器的宽松安全设置，对内部服务进行服务端请求伪造攻击。

CVSS 8.1 · High EPSS 0.49% · P40

Affected Version Matrix 2

VendorProduct Version RangeStatus
Crawl4AI Crawl4AI < 0.8.7 affected
0.8.7 unaffected
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I. Basic Information for CVE-2026-56264

Vulnerability Information
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Vulnerability Title
Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Crawl4AI before 0.8.7 contains an arbitrary JavaScript execution vulnerability in the Docker API server's /execute_js endpoint, which accepts and executes arbitrary user-supplied JavaScript in the server's browser context with --disable-web-security enabled. An attacker can execute arbitrary JavaScript and, combined with the browser's relaxed security settings, perform server-side request forgery against internal services.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
UncleCode Crawl4AI 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UncleCode Crawl4AI是新加坡UncleCode个人开发者的一款AI驱动的爬虫软件。 UncleCode Crawl4AI 0.8.7之前版本存在代码注入漏洞，该漏洞源于Docker API服务器的/execute_js端点接受并执行攻击者提供的任意JavaScript，且浏览器启用了--disable-web-security，可能导致攻击者执行任意JavaScript并结合浏览器的宽松安全设置，对内部服务进行服务端请求伪造攻击。
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
Crawl4AI Crawl4AI 0 ~ 0.8.7 -

II. Public POCs for CVE-2026-56264

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6822 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-56264

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Vendor Advisories for CVE-2026-56264 (2)

Other References for CVE-2026-56264 (1)

IV. Related Vulnerabilities

Same product: Crawl4AI
Same vendor: Crawl4AI
Same weakness: CWE-94

V. Comments for CVE-2026-56264

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