PT-2026-51404 · Crawl4Ai · Crawl4Ai

Published 2026-06-22 · Updated 2026-06-22 · CVE-2026-56266

NVD

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

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.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-56266

Affected Products

Crawl4Ai

References · 4

• https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-56266 · Security Note
• https://github.com/unclecode/crawl4ai · Note
• https://vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints · Note