CVE-2026-56266

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.6
EG Score
8.6(medium)
EPSS
19.4%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 30, 2026

Advisory Details (3)

Auto-updated Jun 23, 2026
Patch available. Sources: github.
generic

Crawl4AI - Server-Side Request Forgery via Direct Crawl Endpoints | Advisories | VulnCheck

https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints
generic

GitHub - unclecode/crawl4ai: 🚀🤖 Crawl4AI: Open-source LLM Friendly Web Crawler & Scraper. Don't be shy, join here: https://discord.gg/jP8KfhDhyN · GitHub

https://github.com/unclecode/crawl4ai
github Patch Available

Multiple Docker API Vulnerabilities - File Write, SSRF, Auth Bypass, XSS, JS Execution · Advisory · unclecode/crawl4ai · GitHub

https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg

Vendor Advisories for CVE-2026-56266(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
crawl4ai0.3.0 ... 0.8.6 (64 versions)0.8.7—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 22× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 23:03 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-05 21:33 UTCEG score recompute
  7. 2026-07-05 09:29 UTCEG score recompute
  8. 2026-07-05 02:31 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 21:26 UTCEG score recompute
  11. 2026-07-04 09:06 UTCEG score recompute
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-03 16:59 UTCEG score recompute
  15. 2026-07-03 04:56 UTCEG score recompute
  16. 2026-07-02 16:27 UTCEG score recompute
  17. 2026-07-02 04:24 UTCEG score recompute
  18. 2026-07-01 16:22 UTCEG score recompute
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 04:19 UTCEG score recompute
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-30 16:13 UTCEG score recompute
  23. 2026-06-30 03:43 UTCEG score recompute
  24. 2026-06-29 15:30 UTCEG score recompute
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 24 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-29 03:22 UTCEG score recompute
  3. 2026-06-28 15:19 UTCEG score recompute
  4. 2026-06-28 14:07 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-28 03:16 UTCEG score recompute
  8. 2026-06-27 15:13 UTCEG score recompute
  9. 2026-06-27 03:10 UTCEG score recompute
  10. 2026-06-27 03:08 UTCEPSS rescore
  11. 2026-06-26 15:08 UTCEG score recompute
  12. 2026-06-26 03:05 UTCEG score recompute
  13. 2026-06-25 15:03 UTCEG score recompute
  14. 2026-06-25 13:49 UTCEPSS rescore
  15. 2026-06-25 03:00 UTCEG score recompute
  16. 2026-06-24 14:58 UTCEG score recompute
  17. 2026-06-24 14:05 UTCEPSS rescore
  18. 2026-06-24 02:55 UTCEG score recompute
  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-23 21:33 UTCEPSS rescore
  21. 2026-06-23 14:49 UTCEG score recompute
  22. 2026-06-23 02:36 UTCEG score recompute▼ 1.20
  23. 2026-06-23 00:00 UTCMITRE cvelistV5CVSS v3 → 8.6 · CVSS v4 → 9.2 · severity → HIGH
  24. 2026-06-22 22:37 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56266?
CVE-2026-56266 is a high vulnerability published on June 16, 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…
When was CVE-2026-56266 disclosed?
CVE-2026-56266 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56266 actively exploited?
CVE-2026-56266 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56266?
CVE-2026-56266 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-56266?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56266, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-56266

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