Allocation of Resources Without Limits or Throttling in Spring AI - CVE-2026-59279
Published: August 31, 2026
Vulnerability identifier: #VU146384
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59279
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper resource allocation in the MCP Streamable HTTP server transport when handling repeated initialize requests. A remote attacker can send repeated initialize requests to cause a denial of service.
The issue affects the WebFlux and WebMvc variants, and authentication is not required by default.
Affected software
Spring AI
How to mitigate CVE-2026-59279
Install security update from vendor's website.
Spring AI - addressed in versions 2.0.0.1, 2.0.1