CVE-2026-56265

CRITICAL 9.8

Crawl4AI - Authentication Bypass via Hardcoded JWT Signing Key

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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 authentication and gaining full access to protected functionality.

CWE	CWE-798
Vendor	crawl4ai
Product	crawl4ai
Published	Jun 21, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Crawl4AI / Crawl4AI

0 < 0.8.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg github.com: https://github.com/unclecode/crawl4ai vulncheck.com: https://www.vulncheck.com/advisories/crawl4ai-authentication-bypass-via-hardcoded-jwt-signing-key