Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bitwarden | Server | < 2026.5.0 |
Related Weaknesses (CWE)
References
- https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623daPatch
- https://github.com/bitwarden/server/pull/7526Issue Tracking
- https://github.com/bitwarden/server/releases/tag/v2026.5.0Release Notes
- https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-adminExploitPatchThird Party Advisory
- https://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bThird Party Advisory
FAQ
What is CVE-2026-57520?
CVE-2026-57520 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 explo...
How severe is CVE-2026-57520?
CVE-2026-57520 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-57520?
Check the references section above for vendor advisories and patch information. Affected products include: Bitwarden Server.