Is CVE-2026-40966 actively exploited?

No active exploitation of CVE-2026-40966 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40966 be exploited remotely?

Yes. CVE-2026-40966 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40966?

CVE-2026-40966 has a CVSS score of 5.9 (MEDIUM).

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MEDIUM

CVE-2026-40966

CWE-284Published: April 28, 2026· Updated: Apr 29, 2026

5.9

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:10.1th

Official 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.

NVD Source

Technical Analysis

CVE-2026-40966 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.9.