CVE-2026-27803
Received Received - Intake
Privilege Escalation in Vaultwarden Collection Management Pre

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, when a Manager has manage=false for a given collection, they can still perform several management operations as long as they have access to the collection. 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
2026-06-14
NVD
CVE-2026-27803
EUVD
EUVD-2026-9503
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-285 The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
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

The vulnerability exists in Vaultwarden, an unofficial Bitwarden compatible server. Before version 1.35.4, a user with Manager role but with manage=false permission for a specific collection could still perform several management operations on that collection if they had access to it. This means the intended restriction on management capabilities was bypassed.

Impact Analysis

This vulnerability can lead to unauthorized management actions on collections by users who should not have such permissions. As a result, sensitive data could be altered, deleted, or otherwise mismanaged, potentially compromising confidentiality, integrity, and availability of the data stored in Vaultwarden.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

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

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