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CVE-2026-40966

VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration

Published: Apr 28, 2026Updated: Apr 29, 2026 Sources: CVE List NVDCWE-284
5.9MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 85.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

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
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Weaknesses

CWE-284

Affected Products

VMware
commercial·USaka vmware inc
Spring AILibraryLibrary
AI / ML / ai-agent-tooling
and 1 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-40966?We can run the check for you — a free external exposure review, no install. Check my exposure

References

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

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