Spring AI VSCMA Exfiltration via conversationId Injection
CVE-2026-40966 Published on April 28, 2026
VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration
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.
Vulnerability Analysis
CVE-2026-40966 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an Authorization Vulnerability?
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CVE-2026-40966 has been classified to as an Authorization vulnerability or weakness.
Products Associated with CVE-2026-40966
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Affected Versions
VMware Spring AI:- Version 1.0.0 and below 1.0.6 is affected.
- Version 1.1.0 and below 1.1.5 is affected.