CVE-2026-59279

High

Description

The MCP Streamable HTTP server transport (WebFlux and WebMvc variants) does not place any limit on the number of sessions it retains, and by default does not require clients to be authenticated. As a result, a remote attacker can cause the server to accumulate an unbounded number of sessions over time, gradually exhausting available memory and ultimately causing a Denial of Service that affects all legitimate clients. Affected versions: Spring AI: 2.0.0

SeverityHigh
CVSS7.5
Exploit probability—
ProductVmware Spring Ai
PublishedAug 21, 2026
First seenAug 21, 2026

How to fix

Update
  • vmware spring_ai2.0.1 or later

Affected products

ProductAffected versionsFixed in
vmware spring_ai2.0.0 ≤ v < 2.0.12.0.1

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