Crawl4AI - Server-Side Request Forgery via Direct Crawl Endpoints
Priority MEDIUM 48CWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure, Security bypass, Cross-site scripting, Code execution
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918, CWE-306, CWE-79, CWE-94 and the CVSS impact.
Summary
Crawl4AI before 0.8.7 contains a server-side request forgery vulnerability in the /crawl, /crawl/stream, /md, and /llm endpoints that fetch arbitrary user-supplied URLs without validation. Unauthenticated attackers can bypass the internal-address blocklist using IPv6-mapped IPv4 addresses to reach internal services and cloud metadata endpoints.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00476 41st percentileScored 2026-11-07
Fix Fixed Crawl4AI (Crawl4AI): 0.8.7crawl4ai (PyPI): 0.8.7
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| unclecode | Crawl4AI | before 0.8.7 | 0.8.7 | Patch available | CNA |
| — | crawl4ai (PyPI) | before 0.8.7 | 0.8.7 | Patch available | GHSA-365w-hqf6-vxfg |
- Crawl4AI Vendorunclecode Affected before 0.8.7 Fixed in 0.8.7 Patch available CNA
- crawl4ai (PyPI) Vendor— Affected before 0.8.7 Fixed in 0.8.7 Patch available GHSA-365w-hqf6-vxfg
Remediation
- Fix · CNA Crawl4AI (Crawl4AI) Fixed in 0.8.7
- Fix · GHSA-365w-hqf6-vxfg crawl4ai (PyPI) Fixed in 0.8.7 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-56266
- 2026-10-03 Alias added: GHSA-365w-hqf6-vxfg
References
Advisory 8
- GitHub Security Advisory (GHSA-365w-hqf6-vxfg)
- https://nvd.nist.gov/vuln/detail/CVE-2026-56266
- https://github.com/advisories/GHSA-xrfj-6m49-wfmm
- https://github.com/advisories/GHSA-r9hw-78q5-478g
- https://github.com/advisories/GHSA-g2pv-76hm-j4x9
- https://github.com/advisories/GHSA-f23g-2f38-gg94
- https://github.com/advisories/GHSA-8qrg-7j2f-rf2h
- https://github.com/advisories/GHSA-53rg-46cm-4g2v
Other 8
- https://github.com/unclecode/crawl4ai
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-798.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-596.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-3449.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-3443.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-239.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-230.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-229.yaml
More unclecode Crawl4ai vulnerabilities
- TI-2026-38760 Crawl4AI: AST Sandbox Escape via gi_frame.f_back Chain - Pre-Auth RCE in Docker API CVSS 3.1CRITICAL 10.0
- TI-2026-40630 Crawl4AI - Authentication Bypass via Hardcoded JWT Signing Key CVSS 4.0CRITICAL 9.3
- TI-2026-21207 Crawl4AI < 0.8.0 Docker API Unauthenticated Remote Code Execution via Hooks Parameter CVSS 4.0CRITICAL 10.0
- TI-2026-41423 Crawl4AI: Unauthenticated RCE via Chromium launch-argument injection in browser_config.extra_args CVSS 3.1CRITICAL 10.0
- TI-2026-21208 Crawl4AI < 0.8.0 Docker API Local File Inclusion via file URL Handling CVSS 4.0CRITICAL 9.2
- TI-2025-20742 Crawl4AI <=0.4.247 is vulnerable to SSRF in /crawl4ai/async_dispatcher.py. CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-56266 · CVE Program
- CVE-2026-56266 · NVD
- FIRST EPSS
- GHSA-365w-hqf6-vxfg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences