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// vulnerability record
cached · NVD via COSMOS syncCVE-2026-43639
HIGHpublished 2026-05-11 18:16 UTC · 3 months ago · modified 2026-06-17 10:49 UTC
8.9
CVSS / 10
// description
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).
// weaknesses (CWE)
- CWE-862
// references (5)
- https://github.com/bitwarden/server/commit/0918bfdda6f5eec391c69bd9074f6aef4eac0b1d
- 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-provider-clients