CVE-2026-53754
Description
Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.8, the Docker API server's SSRF protection (validate_webhook_url / validate_url_destination in deploy/docker/utils.py) used an explicit IPv4/IPv6 CIDR blocklist that missed several address families. An attacker could reach internal services and cloud metadata endpoints (e.g. 169.254.169.254) despite the filter by encoding an internal IPv4 address inside an IPv6 transition form, or by using the IPv6 unspecified address. Because the Docker API is unauthenticated by default (jwt_enabled: false), no credentials are required. This vulnerability is fixed in 0.8.8.
How to fix
- kidocode crawl4ai0.8.8 or later
- crawl4ai0.8.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kidocode crawl4ai | v < 0.8.8 | 0.8.8 |
| crawl4aiPyPI | v < 0.8.8 | 0.8.8 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.