CVE-2026-59279

Name of the Vulnerable Software and Affected Versions Spring AI version 2.0.0

Description The MCP Streamable HTTP server transport, specifically the WebFlux and WebMvc variants, fails to limit the number of retained sessions and does not require client authentication by default. This allows a remote attacker to trigger the accumulation of an unbounded number of sessions, leading to memory exhaustion and a Denial of Service (DoS) affecting all legitimate clients.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.