---
cve: "CVE-2026-43640"
severity: "HIGH"
cvss: 8.6
epss: "0.5%"
vendor: "Bitwarden"
kev: false
exploited: false
published: "2026-05-11 18:16:37"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-30T20:14:11+02:00"
---

# CVE-2026-43640

> 8.6 HIGH · 🧪 PoC

## Beschreibung

Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 3371bb6144772fb4b6f78a88ba065eef975f19cc (Commit)
- eb251d9bf80724c87b187661783b9354d1784083 (Commit)

## BSI-Hinweise (deutsch)

- [Bitwarden: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-1465)

## Referenzen

- <https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass>
- <https://github.com/bitwarden/server/releases/tag/v2026.4.1>
- <https://github.com/bitwarden/server/pull/7403>
- <https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083>
- <https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-43640) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_