Insecure Default Initialization of Resource Affecting @modelcontextprotocol/sdk package, versions <1.24.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published3 Dec 2025
- disclosed2 Dec 2025
- creditUnknown
Introduced: 2 Dec 2025
NewCVE-2025-66414 (opens in a new tab)How to fix?
Upgrade @modelcontextprotocol/sdk to version 1.24.0 or higher.
Overview
@modelcontextprotocol/sdk is a Model Context Protocol implementation for TypeScript
Affected versions of this package are vulnerable to Insecure Default Initialization of Resource via the StreamableHTTPServerTransport or SSEServerTransport process when enableDnsRebindingProtection is not enabled. An attacker can access resources or invoke tools exposed by the local server by exploiting DNS rebinding through a malicious website.
Note: This is only exploitable if the server is running locally over HTTP without authentication and DNS rebinding protection is not enabled.