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Vulnerability record · CVE-2026-56266 · published 22 June 2026

CVE-2026-56266: Kidocode crawl4ai server-side request forgery (ssrf) vulnerability

Kidocode · Crawl4ai

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.

9.2 CVSS 4.0 Critical EPSS 0.48% · top 61.3% CWE-918 · Server-side request forgery (SSRF)
9.2CVSS 4.0 base score
0.48%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
30 Jun 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/unclecode/crawl4ai Product
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg MitigationVendor Advisory
https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-57572Kidocode crawl4ai argument injection vulnerabilityCrawl4AI is an open-source LLM-friendly web crawler and scraper. Prior to 0.9.0, the Docker API server accepted request-supplied browser_config.extra…EPSS 0.94%10.0CVE-2026-53753Kidocode crawl4ai code injection vulnerabilityCrawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.7, the _safe_eval_expression() function in the computed fields feature us…EPSS 2.9%10.0CVE-2026-26216Kidocode crawl4ai code injection vulnerabilityCrawl4AI versions prior to 0.8.0 contain a remote code execution vulnerability in the Docker API deployment. The /crawl endpoint accepts a hooks para…EPSS 1.7%9.6CVE-2026-57571Kidocode crawl4ai path traversal vulnerabilityCrawl4AI is an open-source LLM-friendly web crawler and scraper. Prior to 0.9.0, when the crawler saves a downloaded file, the destination filename w…EPSS 0.81%9.3CVE-2026-56265Kidocode crawl4ai hard-coded credentials vulnerabilityCrawl4AI before 0.8.7 contains an authentication bypass vulnerability due to a hardcoded default JWT signing key in the Docker API server. Attackers …EPSS 2.6%9.2CVE-2026-56261Kidocode crawl4ai server-side request forgery (ssrf) vulnerabilityCrawl4AI before 0.8.7 contains a server-side request forgery (SSRF) vulnerability in the Docker API server's /crawl/job and /llm/job endpoints, which…EPSS 0.51%9.2CVE-2026-56264Kidocode crawl4ai code injection vulnerabilityCrawl4AI before 0.8.7 contains an arbitrary JavaScript execution vulnerability in the Docker API server's /execute_js endpoint, which accepts and exe…EPSS 0.49%9.2CVE-2026-56258Kidocode crawl4ai path traversal vulnerabilityCrawl4AI before 0.8.8 contains an arbitrary file write vulnerability in the screenshot and PDF endpoints that allows unauthenticated attackers to wri…EPSS 0.91%

Source: NIST National Vulnerability Database (record CVE-2026-56266), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.