CVE-2026-43913: CWE-863: Incorrect Authorization in dani-garcia vaultwarden
Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.5, Vaultwarden allows an unconfirmed organization owner to purge the entire organization vault. The organization invite flow uses a two-step process: accepting an invite transitions membership from Invited to Accepted, and a separate confirmation by an existing owner upgrades it to Confirmed. The POST /api/ciphers/purge endpoint uses plain Headers and only checks that the membership type is Owner without verifying that the membership status is Confirmed. An authenticated user who has been invited as an organization owner and has accepted the invite and has not yet been confirmed can call this endpoint to hard-delete all ciphers and attachments in the organization, causing immediate organization-wide data loss. This vulnerability is fixed in 1.35.5.
AI Analysis
Technical Summary
Vaultwarden, a Bitwarden-compatible server, had an incorrect authorization vulnerability (CWE-863) in versions before 1.35.5. The organization invite process involves membership statuses: Invited, Accepted, and Confirmed. The purge endpoint incorrectly authorizes users based solely on membership type Owner without verifying the Confirmed status. Consequently, an authenticated user with Accepted but unconfirmed Owner status can invoke the purge endpoint to hard-delete all organizational data. This flaw leads to immediate and complete data loss within the organization vault. The vulnerability is tracked as CVE-2026-43913 with a CVSS 3.1 score of 8.1 (high severity).
Potential Impact
Exploitation allows an authenticated user with an unconfirmed Owner membership status to delete all ciphers and attachments in the organization vault, causing immediate and total data loss for the organization. There is no confidentiality impact reported, but integrity and availability are severely affected.
Mitigation Recommendations
Upgrade Vaultwarden to version 1.35.5 or later, where this authorization flaw is fixed. Patch status is confirmed by the vendor stating the issue is resolved in 1.35.5. Until upgraded, restrict organization owner invitations and monitor for suspicious purge requests if possible.
CVE-2026-43913: CWE-863: Incorrect Authorization in dani-garcia vaultwarden
Description
Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.5, Vaultwarden allows an unconfirmed organization owner to purge the entire organization vault. The organization invite flow uses a two-step process: accepting an invite transitions membership from Invited to Accepted, and a separate confirmation by an existing owner upgrades it to Confirmed. The POST /api/ciphers/purge endpoint uses plain Headers and only checks that the membership type is Owner without verifying that the membership status is Confirmed. An authenticated user who has been invited as an organization owner and has accepted the invite and has not yet been confirmed can call this endpoint to hard-delete all ciphers and attachments in the organization, causing immediate organization-wide data loss. This vulnerability is fixed in 1.35.5.
CVSS v3.1
Score 8.1high
Affected software
pkg:cargo/github/dani-garcia/vaultwardenRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Vaultwarden, a Bitwarden-compatible server, had an incorrect authorization vulnerability (CWE-863) in versions before 1.35.5. The organization invite process involves membership statuses: Invited, Accepted, and Confirmed. The purge endpoint incorrectly authorizes users based solely on membership type Owner without verifying the Confirmed status. Consequently, an authenticated user with Accepted but unconfirmed Owner status can invoke the purge endpoint to hard-delete all organizational data. This flaw leads to immediate and complete data loss within the organization vault. The vulnerability is tracked as CVE-2026-43913 with a CVSS 3.1 score of 8.1 (high severity).
Potential Impact
Exploitation allows an authenticated user with an unconfirmed Owner membership status to delete all ciphers and attachments in the organization vault, causing immediate and total data loss for the organization. There is no confidentiality impact reported, but integrity and availability are severely affected.
Mitigation Recommendations
Upgrade Vaultwarden to version 1.35.5 or later, where this authorization flaw is fixed. Patch status is confirmed by the vendor stating the issue is resolved in 1.35.5. Until upgraded, restrict organization owner invitations and monitor for suspicious purge requests if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-04T16:11:33.086Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a028743cbff5d86108b5077
Added to database: 05/12/2026, 01:49:55 UTC
Last enriched: 05/19/2026, 09:09:12 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 100
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