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TI-2026-38762 Aliases CVE-2026-53755GHSA-6qhc-x826-342c

Crawl4AI: SSRF via proxy settings in the Docker server bypasses the crawl-URL SSRF check

Priority MEDIUM 46CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.9, the Docker API server applied its SSRF destination check to the crawl target URL only, not to the proxy address. An unauthenticated request could supply a proxy pointing at an internal IP and route the browser through it, reaching internal services and cloud-metadata endpoints, while using a perfectly valid crawl URL. The Docker API is unauthenticated by default. /crawl, /crawl/stream, and /crawl/job accept a browser_config (and crawler_config). The following all feed Chromium's egress and were unchecked: browser_config.proxy_config.server, browser_config.proxy (deprecated field), crawler_config.proxy_config.server, and --proxy-server / --proxy-pac-url / --proxy-bypass-list / --host-resolver-rules flags in browser_config.extra_args. This vulnerability is fixed in 0.8.9.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01577 75th percentileScored 2026-11-07
Fix Fixed crawl4ai (unclecode): 0.8.9crawl4ai (PyPI): 0.8.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
unclecodecrawl4aibefore 0.8.90.8.9Patch availableCNA
—crawl4ai (PyPI)before 0.8.90.8.9Patch availableGHSA-6qhc-x826-342c
  • crawl4ai Vendorunclecode Affected before 0.8.9 Fixed in 0.8.9 Patch available CNA
  • crawl4ai (PyPI) Vendor— Affected before 0.8.9 Fixed in 0.8.9 Patch available GHSA-6qhc-x826-342c

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:*before 0.8.9Vulnerableunclecode
  • cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:* Versions before 0.8.9 Vulnerable ·unclecode

Remediation

  • Fix · CNA crawl4ai (unclecode) Fixed in 0.8.9
  • Fix · GHSA-6qhc-x826-342c crawl4ai (PyPI) Fixed in 0.8.9 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53755
  2. 2026-10-03 Alias added: GHSA-6qhc-x826-342c

References

Advisory 2

Other 2

  • 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-2026-40631 Crawl4AI - Server-Side Request Forgery via Direct Crawl Endpoints CVSS 4.0CRITICAL 9.2
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences