CVE-2026-43914

Description

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.4, there is a security vulnerability in Vaultwarden that allows bypassing the login brute-force protection if email 2fa is enabled. If email 2fa is enabled, the unprotected 2fa-function send_email_login (email.rs, api endpoint /api/two-factor/send-email-login) also acts as an oracle determining whether a username-password combination is correct. An attacker can abuse that endpoint to brute-force passwords without rate-limiting. This works even for users who don't have email 2fa configured. This vulnerability is fixed in 1.35.4.

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Produits concernés

• dani-garcia vaultwarden

Scores CVSS

Faiblesses (CWE)

• CWE-307

Références

• https://github.com/dani-garcia/vaultwarden/pull/6867 Issue TrackingPatch
• https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.4 ProductRelease Notes
• https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g ExploitPatchVendor Advisory
• https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g ExploitPatchVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories