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).
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History
Mon, 11 May 2026 20:15:00 +0000
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ssvc
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Mon, 11 May 2026 18:00:00 +0000
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| 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). | |
| Title | Bitwarden Server < 2026.4.0 Missing Authorization via Provider Clients | |
| Weaknesses | CWE-862 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-05-11T17:14:04.552Z
Updated: 2026-05-11T19:14:22.085Z
Reserved: 2026-05-01T18:22:45.642Z
Link: CVE-2026-43639
Updated: 2026-05-11T19:14:04.106Z
Status : Received
Published: 2026-05-11T18:16:36.970
Modified: 2026-05-11T18:16:36.970
Link: CVE-2026-43639
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