Newly released CVEs across every platform — sleek to read, verbose on demand, and served raw as markdown for AI and agent ingestion. Severity reads as depth: the deeper the contact, the graver the threat.
Depth = severity + exploitation
CVE-2026-116684Medium· 6.8Model Context Protocol Python SDK: Server bearer-token authentication accepts tokens issued for a different resource server
CVE-2026-116685Medium· 5.9Model Context Protocol Python SDK: HTTP client transports followed cross-origin redirects carrying custom headers and bodies
CVE-2026-53965HighThe 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 …
CVE-2026-63118MediumMCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection
CVE-2026-63119Medium· 6.2MCP Ruby SDK: Unbounded line buffer in stdio transports leads to memory exhaustion (DoS)
CVE-2026-67430Medium· 5.3MCP Ruby SDK: Unbounded session retention in StreamableHTTPTransport allows memory exhaustion via initialize flood
CVE-2026-67432High· 7.5MCP Ruby SDK: Unbounded JSON-RPC request body causes uncontrolled memory allocation in StreamableHTTPTransport
CVE-2026-67431HighMCP Ruby SDK: Ruby SSE Session Poisoning
CVE-2026-52869High· 7.1MCP Python SDK: HTTP transports serve session requests without verifying the authenticated principal
CVE-2026-59950HighMCP Python SDK: WebSocket server transport does not support Host/Origin validation
CVE-2026-52870High· 7.6MCP Python SDK: Experimental task handlers allow any client to access and cancel other clients' tasks
CVE-2025-53365HighMCP Python SDK has Unhandled Exception in Streamable HTTP Transport, Leading to Denial of Service
CVE-2025-53366HighMCP Python SDK vulnerability in the FastMCP Server causes validation error, leading to DoS
The beta is over. VulnSea now runs at vulnsea.com, every old beta link redirects to the same page, and your account, API keys and watchlists came with it. Plus a round of hardening, faster pages, and new request limits agents should know about.
A summary of everything that shipped over the last two weeks — the whole corpus is open, agents get change feeds, alias resolution and EPSS movers, and the data now includes CVE.org, vendor CSAF, aggregated exploits and per-source scores.
A step-by-step guide to plugging VulnSea into automated and agentic workflows — poll the delta, triage without burning tokens, match an SBOM, and let an MCP-native model do the reasoning.