CVE-2026-53755

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.

CVSS v3 8.6 HIGH

8.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-6qhc-x826-342c	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:*

History

29 Jun 2026, 16:50

Type	Values Removed	Values Added
References	~~() https://github.com/unclecode/crawl4ai/security/advisories/GHSA-6qhc-x826-342c -~~	() https://github.com/unclecode/crawl4ai/security/advisories/GHSA-6qhc-x826-342c - Third Party Advisory
First Time		Kidocode Kidocode crawl4ai
CPE		cpe:2.3:a:kidocode:crawl4ai::::::::

23 Jun 2026, 19:22

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-23 19:17

Updated : 2026-06-29 16:50

NVD link : CVE-2026-53755

Mitre link : CVE-2026-53755

CVE.ORG link : CVE-2026-53755

JSON object : View

Products Affected

kidocode

crawl4ai

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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