CVE-2026-57520 | Bitwarden Server before 2026.5.0 contains a privilege escala… | CVSS 7.1 HIGH

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.

Metadata

CVE ID: CVE-2026-57520
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-24 15:58 UTC
Published: 2026-06-25 19:08 UTC
Last updated: 2026-06-25 19:08 UTC
Primary CWE: CWE-862
Missing Authorization
Vendor / Product: bitwarden / server
Sources: cve.org · NVD

Severity & Metrics

7.1 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Affected products (1)

Vendor	Product	Platform	Versions
bitwarden	server	—	0 < 2026.5.0

Weakness (CWE)

CWE	Source	Description
CWE-862	cna	Missing Authorization

CVSS scores (2)

Score	Severity	Version	Source	Vector
7.1	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
7.1	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

References (5)