How severe is CVE-2026-40966?

CVE-2026-40966 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-40966 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40966?

CVE-2026-40966 affects Vmware Spring Ai. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40966?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40966 have an EU (EUVD) identifier?

Yes. CVE-2026-40966 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26002.

When was CVE-2026-40966 published?

CVE-2026-40966 was published on 2026-04-28 and last updated on 2026-06-17.

CVE-2026-40966

CVE-2026-40966 is a medium-severity vulnerability in Vmware Spring Ai with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26002
Weakness: CWE-284
Affected product: Vmware Spring Ai
Published: 2026-04-28
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-40966?: CVE-2026-40966 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-40966 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40966?: CVE-2026-40966 affects Vmware Spring Ai. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40966?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40966 have an EU (EUVD) identifier?: Yes. CVE-2026-40966 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26002.
When was CVE-2026-40966 published?: CVE-2026-40966 was published on 2026-04-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vmware:spring_ai:*:*:*:*:*:*:*:*

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