5.9

CVE-2026-40966: vmware spring_ai Improper Access Control

CVSS: 5.9v3.1MediumAnalyzed
AliasesGHSA-v6x6-pjxw-3pv2
Published 28-04-2026Last modified 28-04-2026
Open JSON

Vulnerability summary

CVE-2026-40966 is a medium (CVSS 5.9) Improper Access Control vulnerability in vmware spring_ai. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.6% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.37%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 28-04-2026
    PublishedVulnerability first disclosed.
  2. 28-04-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

+0.14 pp

From 0.23% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.37%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Org.springframework.ai1 product
  • spring-ai-advisors-vector-store≥ 1.0.0, < 1.0.6 | ≥ 1.1.0, < 1.1.5
Vmware1 product
  • spring_ai≥ 1.0.0, < 1.0.6 | ≥ 1.1.0, < 1.1.5

2 vendors · 2 products

References

5 links