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8 vulnerabilities by modelcontextprotocol
CVE-2025-66416 (GCVE-0-2025-66416)
Vulnerability from cvelistv5 – Published: 2025-12-02 18:14 – Updated: 2025-12-02 18:45
VLAI?
Summary
The MCP Python SDK, called `mcp` on PyPI, is a Python implementation of the Model Context Protocol (MCP). Prior to version 1.23.0, tThe Model Context Protocol (MCP) Python SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication using FastMCP with streamable HTTP or SSE transport, and has not configured TransportSecuritySettings, a malicious website could exploit DNS rebinding to bypass same-origin policy restrictions and send requests to the local MCP server. This could allow an attacker to invoke tools or access resources exposed by the MCP server on behalf of the user in those limited circumstances. Note that running HTTP-based MCP servers locally without authentication is not recommended per MCP security best practices. This issue does not affect servers using stdio transport. This vulnerability is fixed in 1.23.0.
Severity ?
CWE
- CWE-1188 - Insecure Default Initialization of Resource
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| modelcontextprotocol | python-sdk |
Affected:
< 1.23.0
|
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CVE-2025-66414 (GCVE-0-2025-66414)
Vulnerability from cvelistv5 – Published: 2025-12-02 18:12 – Updated: 2025-12-02 18:46
VLAI?
Summary
MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. Prior to 1.24.0, The Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPServerTransport or SSEServerTransport and has not enabled enableDnsRebindingProtection, a malicious website could exploit DNS rebinding to bypass same-origin policy restrictions and send requests to the local MCP server. This could allow an attacker to invoke tools or access resources exposed by the MCP server on behalf of the user in those limited circumstances. Note that running HTTP-based MCP servers locally without authentication is not recommended per MCP security best practices. This issue does not affect servers using stdio transport. This vulnerability is fixed in 1.24.0.
Severity ?
CWE
- CWE-1188 - Insecure Default Initialization of Resource
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| modelcontextprotocol | typescript-sdk |
Affected:
< 1.24.0
|
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CVE-2025-58444 (GCVE-0-2025-58444)
Vulnerability from cvelistv5 – Published: 2025-09-08 21:24 – Updated: 2025-09-09 13:31
VLAI?
Summary
The MCP inspector is a developer tool for testing and debugging MCP servers. A cross-site scripting issue was reported in versions of the MCP Inspector local development tool prior to 0.16.6 when connecting to untrusted remote MCP servers with a malicious redirect URI. This could be leveraged to interact directly with the inspector proxy to trigger arbitrary command execution. Users are advised to update to 0.16.6 to resolve this issue.
Severity ?
CWE
- CWE-84 - Improper Neutralization of Encoded URI Schemes in a Web Page
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| modelcontextprotocol | inspector |
Affected:
< 0.16.6
|
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CVE-2025-53366 (GCVE-0-2025-53366)
Vulnerability from cvelistv5 – Published: 2025-07-04 22:05 – Updated: 2025-07-08 13:52
VLAI?
Summary
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 restarted. Impact may vary depending on the deployment conditions, and presence of infrastructure-level resilience measures. Version 1.9.4 contains a patch for the issue.
Severity ?
CWE
- CWE-248 - Uncaught Exception
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| modelcontextprotocol | python-sdk |
Affected:
< 1.9.4
|
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CVE-2025-53365 (GCVE-0-2025-53365)
Vulnerability from cvelistv5 – Published: 2025-07-04 22:03 – Updated: 2025-07-08 13:53
VLAI?
Summary
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 the server to crash and requiring a restart to restore service. Impact may vary depending on the deployment conditions, and presence of infrastructure-level resilience measures. Version 1.10.0 contains a patch for the issue.
Severity ?
CWE
- CWE-248 - Uncaught Exception
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| modelcontextprotocol | python-sdk |
Affected:
< 1.10.0
|
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CVE-2025-53109 (GCVE-0-2025-53109)
Vulnerability from cvelistv5 – Published: 2025-07-02 14:30 – Updated: 2025-07-02 14:50
VLAI?
Summary
Model Context Protocol Servers is a collection of reference implementations for the model context protocol (MCP). Versions of Filesystem prior to 0.6.4 or 2025.7.01 could allow access to unintended files via symlinks within allowed directories. Users are advised to upgrade to 0.6.4 or 2025.7.01 resolve.
Severity ?
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| modelcontextprotocol | servers |
Affected:
< 0.6.4
Affected: < 2025.7.01 |
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CVE-2025-53110 (GCVE-0-2025-53110)
Vulnerability from cvelistv5 – Published: 2025-07-02 14:30 – Updated: 2025-07-02 15:13
VLAI?
Summary
Model Context Protocol Servers is a collection of reference implementations for the model context protocol (MCP). Versions of Filesystem prior to 0.6.4 or 2025.7.01 could allow access to unintended files in cases where the prefix matches an allowed directory. Users are advised to upgrade to 0.6.4 or 2025.7.01 resolve.
Severity ?
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| modelcontextprotocol | servers |
Affected:
< 0.6.4
Affected: < 2025.7.01 |
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CVE-2025-49596 (GCVE-0-2025-49596)
Vulnerability from cvelistv5 – Published: 2025-06-13 20:11 – Updated: 2025-07-09 20:19
VLAI?
Summary
The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.
Severity ?
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| modelcontextprotocol | inspector |
Affected:
< 0.14.1
|
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