CVE-2026-57520

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 v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4	Patch
https://github.com/bitwarden/server/pull/7526	Issue Tracking
https://github.com/bitwarden/server/releases/tag/v2026.5.0	Release Notes
https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin	Exploit Patch Third Party Advisory
https://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpoint	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-25 20:17

Updated : 2026-07-14 22:17

NVD link : CVE-2026-57520

Mitre link : CVE-2026-57520

CVE.ORG link : CVE-2026-57520

JSON object : View

Products Affected

bitwarden

server

CWE

CWE-862

Missing Authorization

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