CVE-2026-57520
Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint
CVSS Score
7.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | bitwarden |
| Product | server |
| Published | Jun 25, 2026 |
Stay Ahead of the Next One
Get instant alerts for bitwarden server
Be the first to know when new high vulnerabilities affecting bitwarden server are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
Low
Affected Versions
bitwarden / server
0 < 2026.5.0
References
sanjokkarki.com.np: https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin github.com: https://github.com/bitwarden/server/releases/tag/v2026.5.0 github.com: https://github.com/bitwarden/server/pull/7526 github.com: https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4 vulncheck.com: https://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpoint
Credits
Sanjok Karki