High severity · published Jun 22, 2026
CVE-2026-56266
Crawl4AI - Server-Side Request Forgery via Direct Crawl Endpoints
8.6
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CR
Crawl4AI · Crawl4AI
before 0.8.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56266
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56266
Product
https://github.com/unclecode/crawl4ai
Mitigation
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg
Third Party Advisory
https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints
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