---
cve: "CVE-2026-40968"
severity: "MEDIUM"
cvss: 4.3
epss: "17%"
vendor: "Spring"
kev: false
exploited: false
published: "2026-04-28 15:16:30"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T01:57:08+02:00"
---

# CVE-2026-40968

> 4.3 MEDIUM

## Beschreibung

When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to the gRPC worker thread and can be inherited by a subsequent unauthenticated request on the same thread. This may allow the subsequent user to gain escalated permissions.

Affected versions:
Spring gRPC: 1.0.0 - 1.0.2 (fixed in 1.0.3). Older, unsupported versions are also affected.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 650e78f5eeeb8c0c366f0e65b65001c35e97014d (Commit)

## Referenzen

- <https://spring.io/security/cve-2026-40968>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-40968) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_