Description
Vaultwarden through 1.37.3 omits organization membership status validation from three cipher access-restriction queries, allowing revoked and not-yet-confirmed members to retain read, write, delete, and attachment access to organization ciphers. Attackers with revoked or pending membership can exploit missing status filters in get_user_collections_access_flags, get_group_collections_access_flags, and is_in_full_access_group to access protected cipher data server-side.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| dani-garcia | vaultwarden | ≤ 1.37.3 | — |
Advisories 1
- WID-SEC-2026-3509 Vaultwarden: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Sep 22, 2026
References
- Pull Request #7554 (open, unmerged) patch issue-tracking
- Cipher::get_access_restrictions at 1.37.3 technical-description
- Group::is_in_full_access_group at 1.37.3 technical-description
- https://github.com/dani-garcia/vaultwarden product
- VulnCheck Advisory: Vaultwarden through 1.37.3 Authorization Bypass via Missing Status Check third-party-advisory