CVE-2026-56266
Published:June 22, 2026
Updated:August 04, 2026
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.
Affected Packages
crawl4ai (CONDA):
Affected version(s) >=0.3.4 <0.8.7Fix Suggestion:
Update to version 0.8.7crawl4ai (PYTHON):
Affected version(s) >=0.3.0 <0.8.7Fix Suggestion:
Update to version 0.8.7Related Resources (22)
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Contact UsCVSS v4
Base Score:
9.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Control of Generation of Code ('Code Injection')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Server-Side Request Forgery (SSRF)
Missing Authentication for Critical Function
Use of Hard-coded Credentials
EPSS
Base Score:
0.48