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      <title>CVE-2026-43914 — Vaultwarden: Brute-force protection bypass vulnerability</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-43914</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; dani-garcia vaultwarden&lt;/p&gt;
&lt;p&gt;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&amp;#39;t have email 2fa configured. This vulnerability is fixed in 1.35.4.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; dani-garcia vaultwarden&lt;/p&gt;
&lt;p&gt;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&amp;#39;t have email 2fa configured. This vulnerability is fixed in 1.35.4.&lt;/p&gt;</content:encoded>
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