9.8

CVE-2026-43914

Exploit

Vaultwarden: Brute-force protection bypass vulnerability

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Dani-garcia ≫ Vaultwarden Version < 1.35.4
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.29% 0.203
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
security-advisories@github.com 7.3 3.9 3.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE-307 Improper Restriction of Excessive Authentication Attempts

The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.

https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g
Patch
Vendor Advisory
Exploit
https://github.com/dani-garcia/vaultwarden/pull/6867
Patch
Issue Tracking
https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.4
Product
Release Notes