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CVE-2026-43639
HIGH(8.0)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Risk Signal Score20/100 — NIEDRIG
- CVSS 8 — Hoch
EPSS-Score
1%
Exploit-Wahrscheinlichkeit (30 Tage)
CVSS Score
8
Technische Schwere
Beschreibung
Bitwarden Server prior to v2026.4.0 contains a missing authorization vulnerability that allows a provider service user to add an arbitrary organization to their provider via `POST /providers/{providerId}/clients/existing`, resulting in takeover of the target organization; self-hosted installations are unaffected as this endpoint is restricted to Cloud via SelfHosted(NotSelfHostedOnly = true).
Referenzen
- https://github.com/bitwarden/server/commit/0918bfdda6f5eec391c69bd9074f6aef4eac0...
- https://github.com/bitwarden/server/pull/7372
- https://github.com/bitwarden/server/releases/tag/v2026.4.0
- https://sanjokkarki.com.np/blog/bitwarden-provider-takeover
- https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-...