Vulnerability in VMware Spring Ai
CVE-2026-40966
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- VMware Spring Ai — versions 1.0.0, 1.1.0
- VMware Spring Ai
Weakness classification (CWE)
References
- spring.io/security/cve-2026-40966 (Vendor Advisory)
- nvd.nist.gov/vuln-metrics/cvss/v3-calculator (US Government Resource)
Frequently asked questions
- What is CVE-2026-40966?
- CVE-2026-40966 is a medium-severity vulnerability in VMware Spring Ai, classified under Improper Access Control. CVSS score: 5.9/10. Published 2026-04-28.
- How severe is CVE-2026-40966?
- Medium severity. CVSS v3 base score is 5.9 out of 10.