---
cve: "CVE-2026-40966"
severity: "MEDIUM"
cvss: 5.9
epss: "23%"
vendor: "VMware"
kev: false
exploited: false
published: "2026-04-28 08:16:01"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T09:38:03+02:00"
---

# CVE-2026-40966

> 5.9 MEDIUM

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 057e111a93e61f911427a581207e853cf68085e9 (Commit)
- 3d662709e1d5041efebf74753a6d119e5196952a (Commit)

## Referenzen

- <https://spring.io/security/cve-2026-40966>
- <https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?version=3.1&vector=AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-40966) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_