Authorization Bypass Through User-Controlled Key Affecting vaultwarden package, versions <1.35.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published8 Mar 2026
- disclosed4 Mar 2026
- creditodgrso
Introduced: 4 Mar 2026
NewCVE-2026-27898 (opens in a new tab)How to fix?
Upgrade vaultwarden to version 1.35.4 or higher.
Overview
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the put_cipher_partial process. An attacker can access sensitive information belonging to other users and perform unauthorized actions by sending a crafted request to the partial update API endpoint with a valid authentication token and a known identifier for the target data.