What is CVE-2026-56265?

CVE-2026-56265 is a critical-severity vulnerability in Crawl4ai, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2026-06-21.

How severe is CVE-2026-56265?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Crawl4ai

CVE-2026-56265

Crawl4AI before 0.8.7 contains an authentication bypass vulnerability due to a hardcoded default JWT signing key in the Docker API server. Attackers who know the default key can forge valid authentication tokens for any user, bypassing aut…

EPSS: 0.008 (51.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Crawl4ai — versions 0, 0.8.7
Kidocode Crawl4ai

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg (vendor-advisory, Mitigation, Vendor Advisory)
https://github.com/unclecode/crawl4ai (Product, product)
VulnCheck Advisory: Crawl4AI - Authentication Bypass via Hardcoded JWT Signing Key (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-56265?: CVE-2026-56265 is a critical-severity vulnerability in Crawl4ai, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2026-06-21.
How severe is CVE-2026-56265?: Critical severity. CVSS v3 base score is 9.8 out of 10.