PatchSiren cyber security CVE debrief
CVE-2026-56265 Crawl4AI CVE debrief
CVE-2026-56265 is a critical authentication bypass vulnerability in Crawl4AI before version 0.8.7. The vulnerability is caused by a hardcoded default JWT signing key in the Docker API server. This allows attackers who know the default key to forge valid authentication tokens for any user, bypassing authentication and gaining full access to protected functionality. The CVSS score for this vulnerability is 9.3, indicating a critical severity. Organizations using Crawl4AI should prioritize patching to prevent exploitation.
- Vendor
- Crawl4AI
- Product
- Unknown
- CVSS
- CRITICAL 9.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-21
- Original CVE updated
- 2026-06-22
- Advisory published
- 2026-06-21
- Advisory updated
- 2026-06-22
Who should care
Organizations using Crawl4AI before version 0.8.7 should prioritize patching to prevent exploitation of this critical authentication bypass vulnerability. The vulnerability allows attackers to forge valid authentication tokens, potentially leading to unauthorized access and data breaches.
Technical summary
The vulnerability is caused by a hardcoded default JWT signing key in the Docker API server of Crawl4AI before version 0.8.7. This allows attackers to forge valid authentication tokens for any user, bypassing authentication and gaining full access to protected functionality. The CVSS vector for this vulnerability is CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/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:X/V:X/RE:X/U:X.
Defensive priority
High priority due to critical CVSS score of 9.3 and potential for unauthorized access
Recommended defensive actions
- Inventory Crawl4AI installations to identify instances that may be vulnerable
- Review official advisories for patching guidance
- Apply patches or updates to Crawl4AI to address the hardcoded JWT signing key vulnerability
- Implement compensating controls, such as additional authentication mechanisms, to limit exposure
- Monitor Crawl4AI instances for suspicious activity
Evidence notes
The primary evidence for this vulnerability is the CVE-2026-56265 record and the NVD detail page. The vulnerability is caused by a hardcoded default JWT signing key in the Docker API server of Crawl4AI before version 0.8.7. Defenders should verify the version of Crawl4AI in use and review official advisories for patching guidance.
Official resources
This article is AI-assisted and based on the supplied source corpus.