Skip to content
OpenAdvisories

Product · modelcontextprotocol

php-sdk

1 known vulnerabilities.

All Critical High Medium Low Exploited only Public exploit

1 result · Clear filters · Feed

  • Medium 6.9
    CVE-2026-53965

    MCP PHP SDK: Unbounded SSE buffer in HttpTransport enables client-side denial of service

    The MCP PHP SDK (Composer package mcp/sdk) is the official Model Context Protocol SDK for PHP. In versions 0.5.0 through 0.7.0, the HTTP client transport reads a Server-Sent Events response stream incrementally and appends each chunk to an in-memory buffer wi…

    modelcontextprotocol php-sdk mcp/sdk Packagist