Bug 2444677 (CVE-2026-27801)

Summary: CVE-2026-27801 vaultwarden: Vaultwarden: Two-factor authentication bypass allows unauthorized access and data deletion.
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Vaultwarden. An authenticated attacker could bypass two-factor authentication (2FA) to perform sensitive actions. This bypass allows the attacker to access a user's API key or delete a user's vault and associated organizations where the user is an administrator or owner. This vulnerability could lead to unauthorized data manipulation and loss.
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Bug Depends On: 2444943, 2444945, 2444944, 2444946, 2444947, 2444948    
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Description OSIDB Bzimport 2026-03-04 22:01:23 UTC
Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Vaultwarden versions 1.34.3 and prior are susceptible to a 2FA bypass when performing protected actions. An attacker who gains authenticated access to a user’s account can exploit this bypass to perform protected actions such as accessing the user’s API key or deleting the user’s vault and organisations the user is an admin/owner of . This issue has been patched in version 1.35.0.