CVE-2026-66416 Leantime CVE debrief

Who should care

Authenticated users of Leantime 3.6.2 and administrators responsible for securing the application should be aware of this vulnerability. Users should be cautious of phishing attempts and verify the authenticity of requests. Administrators should consider implementing additional security measures to prevent exploitation.

Technical summary

The Leantime 3.6.2 application contains a cross-site request forgery vulnerability. This vulnerability allows unauthenticated attackers to perform state-changing actions on behalf of authenticated users. The vulnerability exists due to the exclusion of the Laravel VerifyCsrfToken middleware from the global middleware stack in app/Http/Kernel.php. Attackers can exploit this by crafting malicious pages delivered via phishing emails or malicious websites to trigger unauthorized POST, PUT, and DELETE requests.

Defensive priority

Authenticated users' project creation, modification, and permission change actions can be indirectly tampered with via maliciously crafted pages. Ensure users are aware of phishing risks and verify request authenticity.

Recommended defensive actions

• Verify the authenticity of user requests to prevent unauthorized actions.
• Implement additional security measures to detect and prevent phishing attacks.
• Restrict permissions for authenticated users to minimize potential impact.
• Monitor for suspicious activity and implement compensating controls as needed.
• Ensure users are aware of phishing risks and verify request authenticity.

Evidence notes

The CVE record indicates a cross-site request forgery vulnerability in Leantime 3.6.2. Official records show the vulnerability allows unauthenticated attackers to perform state-changing actions on behalf of authenticated users due to the exclusion of the Laravel VerifyCsrfToken middleware. However, detailed impact and affected scope information is limited.

Official resources