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CVE-2026-40966

VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration

Published: Apr 28, 2026Updated: Apr 28, 2026 Sources: CVE List
NVD MITRE
5.9CVSS
MEDIUM

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None

Weaknesses

CWE-284CWE-284 Improper Access Control

Affected Products

Spring AI
VMware

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://spring.io/security/cve-2026-40966
spring.io
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
nvd.nist.gov

Timeline

Published
Apr 28, 2026
Last Updated
Apr 28, 2026

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