Description
Bitwarden Server before 2026.5.0 contains a privilege escalation vulnerability that allows authenticated Custom users with ManageUsers permission to remove Admin accounts from an organization by exploiting a missing role hierarchy check in the bulk user-remove endpoint. Attackers can supply Admin organization-user IDs in a bulk DELETE request to bypass the guard enforced on the single-user removal path, effectively removing one or more Admin accounts from an organization.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
bitwarden server
Default version status: affected
0 to < 2026.5.0affected
pkg:github/bitwarden/serverReferences
- https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin ↗
- https://github.com/bitwarden/server/releases/tag/v2026.5.0 ↗
- https://github.com/bitwarden/server/pull/7526 ↗
- https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4 ↗
- https://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpoint ↗