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CVE Vulnerability Details :
CVE-2026-56266
PUBLISHED
More InfoOfficial Page
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
View Known Exploited Vulnerability (KEV) details
Published At-22 Jun, 2026 | 21:04
Updated At-23 Jun, 2026 | 13:56
Rejected At-
▼CVE Numbering Authority (CNA)
Crawl4AI - Server-Side Request Forgery via Direct Crawl Endpoints

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 Products
Vendor
Crawl4AI
Product
Crawl4AI
Default Status
unaffected
Versions
Affected
  • From 0 before 0.8.7 (semver)
Unaffected
  • 0.8.7 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-918Server-Side Request Forgery (SSRF)
Type: CWE
CWE ID: CWE-918
Description: Server-Side Request Forgery (SSRF)
Metrics
VersionBase scoreBase severityVector
4.09.2CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
3.18.6HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Version: 4.0
Base score: 9.2
Base severity: CRITICAL
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Version: 3.1
Base score: 8.6
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg
vendor-advisory
https://github.com/unclecode/crawl4ai
product
https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints
third-party-advisory
Hyperlink: https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg
Resource:
vendor-advisory
Hyperlink: https://github.com/unclecode/crawl4ai
Resource:
product
Hyperlink: https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints
Resource:
third-party-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found