CVE-2026-40966

MEDIUM5.9EPSS 0.05%

Spring AI's VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration

Published: 4/28/2026Modified: 5/6/2026

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.

Affected packages (1)

Maven/org.springframework.ai:spring-ai-advisors-vector-store>= 1.0.0, < 1.0.6

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References (4)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-40966
PATCHhttps://github.com/spring-projects/spring-ai
WEBhttps://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
WEBhttps://spring.io/security/cve-2026-40966