CVE-2026-40966

MEDIUM

VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration

Title source: cna

Description

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.

References (2)

Core 2

Core References

https://spring.io/security/cve-2026-40966

https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?version=3.1&vector=AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Scores

CVSS v3 5.9

EPSS 0.0023

EPSS Percentile 13.9%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-284

Status published

Products (5)

org.springframework.ai/spring-ai-advisors-vector-store 1.0.0 - 1.0.6Maven

org.springframework.ai/spring-ai-advisors-vector-store 1.1.0 - 1.1.5Maven

VMware/Spring AI 1.0.0 - 1.0.6

VMware/Spring AI 1.1.0 - 1.1.5

vmware/spring_ai 1.0.0 - 1.0.6

Published Apr 28, 2026

Tracked Since Apr 28, 2026