Uncaught Exception

Overview mcp is a Model Context Protocol SDK Affected versions of this package are vulnerable to Uncaught Exception via the receiveloop function in the shared/session.py file. An attacker can cause the server to crash and require a restart by deliberately triggering an exception after establishin...

CVE-2025-53366

The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol MCP. Prior to version 1.9.4, a validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability 500 errors until manually...

CVE-2025-53365

The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol MCP. Prior to version 1.10.0, if a client deliberately triggers an exception after establishing a streamable HTTP session, this can lead to an uncaught ClosedResourceError on the server side, causing...

MCP Python SDK vulnerability in the FastMCP Server causes validation error, leading to DoS

A validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability 500 errors until manually restarted. Impact may vary depending on the deployment conditions, and presence of infrastructure-level resilience measures. Thank y...

MCP Python SDK has Unhandled Exception in Streamable HTTP Transport, Leading to Denial of Service

If a client deliberately triggers an exception after establishing a streamable HTTP session, this can lead to an uncaught ClosedResourceError on the server side, causing the server to crash and requiring a restart to restore service. Impact may vary depending on the deployment conditions, and...

GHSA-J975-95F5-7WQH MCP Python SDK has Unhandled Exception in Streamable HTTP Transport, Leading to Denial of Service

If a client deliberately triggers an exception after establishing a streamable HTTP session, this can lead to an uncaught ClosedResourceError on the server side, causing the server to crash and requiring a restart to restore service. Impact may vary depending on the deployment conditions, and...

CVE-2025-53366 MCP SDK Vulnerable to FastMCP Server Validation Error, Leading to Denial of Service

The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol MCP. Prior to version 1.9.4, a validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability 500 errors until manually...

CVE-2025-53366 MCP SDK Vulnerable to FastMCP Server Validation Error, Leading to Denial of Service

The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol MCP. Prior to version 1.9.4, a validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability 500 errors until manually...

CVE-2025-53366 MCP SDK Vulnerable to FastMCP Server Validation Error, Leading to Denial of Service

The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol MCP. Prior to version 1.9.4, a validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability 500 errors until manually...

CVE-2025-53366

CVE-2025-53366 relates to the MCP Python SDK (PyPI: mcp). Before version 1.9.4, a validation error can trigger an unhandled exception when processing malformed requests, resulting in service unavailability (HTTP 500) that requires manual restart. The issue varies by deployment conditions and resi...

CVE-2025-53365 MCP Python SDK has Unhandled Exception in Streamable HTTP Transport ,Leading to Denial of Service

The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol MCP. Prior to version 1.10.0, if a client deliberately triggers an exception after establishing a streamable HTTP session, this can lead to an uncaught ClosedResourceError on the server side, causing...

CVE-2025-53365

The MCP Python SDK (package name mcp) has a CVE-2025-53365 issue affecting versions prior to 1.10.0. If a client deliberately triggers an exception after establishing a streamable HTTP session, the server can emit an uncaught ClosedResourceError, potentially crashing the server and requiring a re...

CVE-2025-53365 MCP Python SDK has Unhandled Exception in Streamable HTTP Transport ,Leading to Denial of Service

The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol MCP. Prior to version 1.10.0, if a client deliberately triggers an exception after establishing a streamable HTTP session, this can lead to an uncaught ClosedResourceError on the server side, causing...

PT-2025-28026

Name of the Vulnerable Software and Affected Versions: MCP Python SDK versions prior to 1.10.0 Description: The issue arises when a client deliberately triggers an exception after establishing a streamable HTTP session, leading to an uncaught ClosedResourceError on the server side. This can cause...

MCP Inspector < 0.14.1 Remote Code Execution

According to the self-reported version number, the version of MCP Inspector hosted on the remote is affected by a Remote Code Execution vulnerability. Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number. This detectio...

PT-2025-28027

Name of the Vulnerable Software and Affected Versions: MCP Python SDK versions prior to 1.9.4 Description: A validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability until manually restarted. The impact may vary...

CVE-2025-53107

@cyanheads/git-mcp-server is an MCP server designed to interact with Git repositories. Prior to version 2.1.5, there is a command injection vulnerability caused by the unsanitized use of input parameters within a call to childprocess.exec, enabling an attacker to inject arbitrary system commands...

CVE-2025-53100

RestDB's Codehooks.io MCP Server is an MCP server on the Codehooks.io platform. Prior to version 0.2.2, the MCP server is written in a way that is vulnerable to command injection attacks as part of some of its MCP Server tools definition and implementation. This could result in a user initiated...

CVE-2025-34072 Anthropic Slack MCP Server Data Exfiltration via Link Unfurling

A data exfiltration vulnerability exists in Anthropic’s deprecated Slack Model Context Protocol MCP Server via automatic link unfurling. When an AI agent using the Slack MCP Server processes untrusted data, it can be manipulated to generate messages containing attacker-crafted hyperlinks embeddin...

CVE-2025-34072

CVE-2025-34072 : A data exfiltration vulnerability affects Anthropic’s deprecated Slack Model Context Protocol (MCP) Server. When an AI agent processes untrusted data, attacker-crafted hyperlinks embedded in messages can be revealed by Slack link preview bots (Slack-LinkExpanding, Slackbot, Slack...