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CVE-2026-40966

VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration

CVSS 5.9 MEDIUMEPSS 0.2%CWE-284
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 5.9EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
28 Apr 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
VMware · Spring AI

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