CVE-2026-40966: VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration

MODERATE | APRIL 27, 2026 | CVE-2026-40966

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 Spring Products and Versions

Spring AI:

  • 1.0.0 - 1.0.x
  • 1.1.0 - 1.1.x

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.

Affected version(s) Fix version Availability
1.0.x 1.0.6 OSS
1.1.x 1.1.5 OSS

No further mitigation steps are necessary.

Credit

The issue was reported responsibly by

References

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