High severity8.0NVD Advisory· Published May 11, 2026· Updated May 16, 2026
CVE-2026-43639
CVE-2026-43639
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).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3Patches
Vulnerability mechanics
References
5- github.com/bitwarden/server/commit/0918bfdda6f5eec391c69bd9074f6aef4eac0b1dnvdPatch
- github.com/bitwarden/server/pull/7372nvdIssue TrackingPatch
- sanjokkarki.com.np/blog/bitwarden-provider-takeovernvdExploitThird Party Advisory
- www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-provider-clientsnvdThird Party Advisory
- github.com/bitwarden/server/releases/tag/v2026.4.0nvdRelease Notes
News mentions
0No linked articles in our index yet.