critical9.8
CVE-2026-56266
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-supp…
Impact
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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | crawl4ai | <= 0.8.6 | 0.8.7 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Kidocode | Crawl4ai | before 0.8.7 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-365w-hqf6-vxfg
- https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg
- https://nvd.nist.gov/vuln/detail/CVE-2026-56266
- https://github.com/unclecode/crawl4ai
- https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints
- https://www.vulncheck.com/advisories/crawl4ai-unauthenticated-access-to-monitor-endpoints-via-docker-api-server
- https://www.vulncheck.com/advisories/crawl4ai-stored-cross-site-scripting-in-monitor-dashboard
- https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-webhook-urls
- https://www.vulncheck.com/advisories/crawl4ai-authentication-bypass-via-hardcoded-jwt-signing-key
- https://www.vulncheck.com/advisories/crawl4ai-arbitrary-javascript-execution-via-execute-js-endpoint
- https://www.vulncheck.com/advisories/crawl4ai-arbitrary-file-write-via-output-path-parameter
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-798.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-596.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-3449.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-3443.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-239.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-230.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/crawl4ai/PYSEC-2026-229.yaml
- https://github.com/advisories/GHSA-xrfj-6m49-wfmm
- https://github.com/advisories/GHSA-g2pv-76hm-j4x9
- https://github.com/advisories/GHSA-8qrg-7j2f-rf2h
- https://github.com/advisories/GHSA-53rg-46cm-4g2v
- https://github.com/advisories/GHSA-r9hw-78q5-478g
- https://github.com/advisories/GHSA-f23g-2f38-gg94