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CVE-2026-56259— Crawl4AI - LLM Credential Exfiltration via base_url and Environment Variable Resolution

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 0.8.8之前版本存在信息泄露漏洞，该漏洞源于Docker API服务器中的凭据渗出漏洞，攻击者可以通过提供恶意base_url参数并将api_token设置为env:VARIABLE_NAME，利用未经验证的/md、/llm和/llm/job端点，将LLM API调用重定向到攻击者控制的端点并读取任意环境变量，从而渗出提供商API密钥和服务器密钥（包括用于身份验证绕过

CVSS 8.2 · High EPSS 0.43% · P35

Affected Version Matrix 2

VendorProduct Version RangeStatus
Crawl4AI Crawl4AI < 0.8.8 affected
0.8.8 unaffected
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I. Basic Information for CVE-2026-56259

Vulnerability Information
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Vulnerability Title
Crawl4AI - LLM Credential Exfiltration via base_url and Environment Variable Resolution
Source: CVE Program / CVE List V5
Vulnerability Description
Crawl4AI before 0.8.8 contains credential exfiltration vulnerabilities in the Docker API server that allow attackers to redirect LLM API calls to attacker-controlled endpoints and read arbitrary environment variables. Attackers can exploit the unauthenticated /md, /llm, and /llm/job endpoints by supplying a malicious base_url parameter and setting api_token to env:VARIABLE_NAME to exfiltrate provider API keys and server secrets including JWT SECRET_KEY for authentication bypass.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
UncleCode Crawl4AI 信息泄露漏洞
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 0.8.8之前版本存在信息泄露漏洞，该漏洞源于Docker API服务器中的凭据渗出漏洞，攻击者可以通过提供恶意base_url参数并将api_token设置为env:VARIABLE_NAME，利用未经验证的/md、/llm和/llm/job端点，将LLM API调用重定向到攻击者控制的端点并读取任意环境变量，从而渗出提供商API密钥和服务器密钥（包括用于身份验证绕过
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 ~ 0.8.8 -

II. Public POCs for CVE-2026-56259

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8129 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-2026-56259

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Vendor Advisories for CVE-2026-56259 (2)

IV. Related Vulnerabilities

Same product: Crawl4AI
Same vendor: Crawl4AI
Same weakness: CWE-200

V. Comments for CVE-2026-56259

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