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CVE-2026-56265— Crawl4AI - Authentication Bypass via Hardcoded JWT Signing Key

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之前版本存在信任管理问题漏洞，该漏洞源于硬编码的默认JWT签名密钥，可能导致身份验证绕过。

CVSS 9.8 · Critical EPSS 2.64% · P85

Public Exploits 1

Nuclei · 1 CVE-2026-56265.yaml [template]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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-2026-56265

Vulnerability Information
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Vulnerability Title
Crawl4AI - Authentication Bypass via Hardcoded JWT Signing Key
Source: CVE Program / CVE List V5
Vulnerability Description
Crawl4AI before 0.8.7 contains an authentication bypass vulnerability due to a hardcoded default JWT signing key in the Docker API server. Attackers who know the default key can forge valid authentication tokens for any user, bypassing authentication and gaining full access to protected functionality.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的凭证
Source: CVE Program / CVE List V5
Vulnerability Title
UncleCode Crawl4AI 信任管理问题漏洞
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之前版本存在信任管理问题漏洞，该漏洞源于硬编码的默认JWT签名密钥，可能导致身份验证绕过。
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 ~ 0.8.7 -

II. Public POCs for CVE-2026-56265

# POC Description Source Link Shenlong Link
1 Crawl4AI Docker API server versions before 0.8.7 ship with a hardcoded default JWT signing key ("mysecret") used to sign and verify HS256 authentication tokens. Because the key is identical across every deployment where SECRET_KEY has not been overridden, an unauthenticated attacker can forge a valid Bearer token and use it to access every JWT-protected API endpoint (/md, /html, /screenshot, /pdf, /execute_js, /crawl, /ask). https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-56265.yaml POC Details
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6558 chars
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III. Intelligence Information for CVE-2026-56265

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Vendor Advisories for CVE-2026-56265 (2)

Other References for CVE-2026-56265 (1)

IV. Related Vulnerabilities

Same product: Crawl4AI
Same vendor: Crawl4AI
Same weakness: CWE-798

V. Comments for CVE-2026-56265

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