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vaultwarden

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.

CVE-2026-27803 is a vulnerability in Vaultwarden, an unofficial Rust-based Bitwarden-compatible password manager server, affecting versions prior to 1.35.4. The core issue is improper privilege management (CWE-269), where users assigned the Manager role with the manage=false flag on a collection can still perform multiple management operations on that collection. This bypass occurs because the system fails to enforce the manage=false restriction correctly, allowing unauthorized privilege escalation within the application. The vulnerability also relates to CWE-863 (Incorrect Authorization) and CWE-285 (Improper Authorization), indicating systemic authorization logic flaws. Exploitation requires network access and a user with Manager-level privileges but does not require user interaction, making it easier to exploit in targeted environments. The impact includes unauthorized disclosure and modification of sensitive password data, undermining confidentiality and integrity. The vulnerability was publicly disclosed and assigned a CVSS 3.1 score of 8.3 (high severity), reflecting its potential impact and ease of exploitation. The issue was fixed in Vaultwarden version 1.35.4 by properly enforcing the manage=false flag and correcting authorization checks. No public exploits have been reported yet, but the vulnerability poses a significant risk to organizations relying on Vaultwarden for password management.

Detailed information about CVE-2026-27803: CWE-269: Improper Privilege Management in dani-garcia vaultwarden affecting dani-garcia vaultwarden. Get real-time up

CVE-2026-27803: CWE-269: Improper Privilege Management in dani-garcia vaultwarden - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-27803: CWE-269: Improper Privilege Management in dani-garcia vaultwarden

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