SB2025121827 - Denial of service in MCP Python SDK
Published: December 18, 2025
Security Bulletin ID
SB2025121827
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Uncaught exception (CVE-ID: CVE-2025-53366)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an unhandled exception when processing malformed requests. A remote attacker can send specially crafted requests to the application and perform a denial of service attack.
Remediation
Install update from vendor's website.