Veille CVE
CVE-2026-43639
9.1 CritiqueDescription
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).
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 4.0 | 8.9 Élevée | disclosure@vulncheck.com | CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| 3.1 | 8.0 Élevée | disclosure@vulncheck.com | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
| 3.1 | 9.1 Critique | nvd@nist.gov (NVD) | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
Faiblesses (CWE)
Références
- https://github.com/bitwarden/server/commit/0918bfdda6f5eec391c69bd9074f6aef4eac0b1d Patch
- https://github.com/bitwarden/server/pull/7372 Issue TrackingPatch
- https://github.com/bitwarden/server/releases/tag/v2026.4.0 Release Notes
- https://sanjokkarki.com.np/blog/bitwarden-provider-takeover ExploitThird Party Advisory
- https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-provider-clients Third Party Advisory