CVE-2026-57520 Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint
Authenticated users with ManageUsers permission can remove Admin accounts from an organization by bypassing role hierarchy checks in the bulk user-remove endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-57520?
CVE-2026-57520 is a high-severity vulnerability in bitwarden server, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-57520?
It affects 1 product.
Products include Bitwarden Server.
How do I fix CVE-2026-57520?
No fix has been published for CVE-2026-57520 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-57520 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57520 exists.
Other vulnerabilities in bitwarden server
- CVE-2026-60104 Bitwarden Server < 2026.6.0 Authorization Bypass via Admin Auth Request
- CVE-2026-43639 Bitwarden Server < 2026.4.0 Missing Authorization via Provider Clients
- CVE-2026-43640 Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key
- CVE-2020-15879 Server-side request forgery in n/a
- CVE-2019-19766 Weak cryptography in n/a
Sources
Also known as GHSA-6f6g-3qf9-xqc4.