CVE-2026-108714High· 7.5▾ TwilightMCP Kotlin SDK through 0.15.0 contains an uncontrolled memory allocation vulnerability that allows remote clients to exhaust server memory because Application.mcpWebSocket installs Ktor WebSockets without a maxFrameSize limit. Attackers …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.4%
Last analysed / modified upstream
MCP Kotlin SDK through 0.15.0 contains an uncontrolled memory allocation vulnerability that allows remote clients to exhaust server memory because Application.mcpWebSocket installs Ktor WebSockets without a maxFrameSize limit. Attackers can send small frame headers declaring payloads near 2 GiB over one or a few connections, forcing huge heap allocations and causing denial of service.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-109527High· 7.5The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients
CVE-2026-108395High· 7.5The Model Context Protocol Java SDK is the official Java SDK for Model Context Protocol servers and clients
CVE-2026-59951Medium· 6.9The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MCP)
CVE-2026-53937Medium· 6.2MCP Kotlin SDK is the Kotlin Multiplatform software development kit for the Model Context Protocol
GHSA-f897-62hf-6gxqHigh· 7.5MCP TypeScript SDK: HTTP server transports and handlers did not limit request body size or JSON-RPC batch length
CVE-2026-111768High· 7.5MCP TypeScript SDK: One HTTP request within the default size limit could exhaust server memory during validation