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CVE-2026-57520

Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint

Published: Jun 25, 2026Updated: Jul 14, 2026 Sources: CVE List NVDCWE-862
7.1HIGH
NVD MITRE
EPSS Score
0.4%
Top 72.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:LAvailability
Low
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Weaknesses

CWE-862

Affected Products

bitwarden
oss-projectaka bitwarden cli
serverMixed
Security Products / identity-access-mgmt

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin
sanjokkarki.com.np
https://github.com/bitwarden/server/releases/tag/v2026.5.0
github.com
https://github.com/bitwarden/server/pull/7526
github.com
and 2 more references View all →

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