CVE-2026-40966 MEDIUM

CVE-2026-40966: VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration

Vendor Vmware
Product Spring AI
Weakness CWE-284
Published April 28, 2026
Last update April 28, 2026

CVSS base score

5.9/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

In Spring AI, an attacker can bypass conversation isolation and exfiltrate sensitive memory from other users’ chat histories, including secrets and credentials, by injecting filter logic through conversationId. Only applications that use VectorStoreChatMemoryAdvisor and pass user-supplied input as a conversationId are affected.

Key dates

02Disclosure timeline

April 28, 2026 CVE published
April 28, 2026 Record updated