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CVE-2026-53755

HIGH
8.6
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-53755
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-10 17:48 UTC
Published
2026-06-23 18:15 UTC
Last updated
2026-06-23 18:15 UTC
Primary CWE
CWE-918
CWE-918: Server-Side Request Forgery (SSRF)
Vendor / Product
unclecode / crawl4ai
Sources
cve.org  ·  NVD

Severity & Metrics

8.6 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Affected products (1)
VendorProductPlatformVersions
unclecode crawl4ai — < 0.8.9
Weakness (CWE)
CWESourceDescription
CWE-918 cna CWE-918: Server-Side Request Forgery (SSRF)
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.6 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
References (1)
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