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VULNERABILITIES

CVE-2026-57520 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4 [email protected]Patch
https://github.com/bitwarden/server/pull/7526 [email protected]Issue Tracking
https://github.com/bitwarden/server/releases/tag/v2026.5.0 [email protected]Release Notes
https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin [email protected]ExploitPatchThird Party Advisory
https://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpoint [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-862Missing Authorization[email protected]

Affected Products

ProductVersions
bitwarden server
< 2026.5.0

CPE

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

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-57520
NVD Published Date:
Jun 25, 2026
NVD Last Modified:
Jul 14, 2026
Source:
[email protected]