CVE-2026-27802
Received Received - Intake
Privilege Escalation in Vaultwarden via Bulk Permission Update

Publication date: 2026-03-04

Last updated on: 2026-03-06

Assigner: GitHub, Inc.

Description
Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, there is a privilege escalation vulnerability via bulk permission update to unauthorized collections by Manager. This issue has been patched in version 1.35.4.
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Meta Information
Published
2026-03-04
Last Modified
2026-03-06
Generated
2026-06-16
AI Q&A
2026-03-05
EPSS Evaluated
2026-06-15
NVD
CVE-2026-27802
EUVD
EUVD-2026-9502
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
dani-garcia vaultwarden to 1.35.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
CWE-269 The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
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Executive Summary

This vulnerability exists in Vaultwarden, an unofficial Bitwarden compatible server. Before version 1.35.4, a user with Manager privileges could escalate their privileges by performing a bulk permission update on collections they are not authorized to access. This means that a Manager could gain unauthorized access or control over collections they should not have permission to manage.

Impact Analysis

The vulnerability allows a user with Manager privileges to escalate their access rights improperly, potentially gaining unauthorized access to sensitive collections. This can lead to exposure, modification, or deletion of confidential data stored within those collections, compromising confidentiality, integrity, and availability.

Compliance Impact

I don't know

Detection Guidance

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Mitigation Strategies

To mitigate this privilege escalation vulnerability in Vaultwarden, you should upgrade your Vaultwarden server to version 1.35.4 or later, where the issue has been patched.

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