{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/65598?format=json","vulnerability_id":"VCID-mtxu-jynh-5qdr","summary":"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.","aliases":[{"alias":"CVE-2026-43914"}],"fixed_packages":[],"affected_packages":[],"references":[{"reference_url":"https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.4","reference_id":"1.35.4","reference_type":"","scores":[{"value":"7.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-05-12T12:51:45Z/"}],"url":"https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.4"},{"reference_url":"https://github.com/dani-garcia/vaultwarden/pull/6867","reference_id":"6867","reference_type":"","scores":[{"value":"7.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-05-12T12:51:45Z/"}],"url":"https://github.com/dani-garcia/vaultwarden/pull/6867"},{"reference_url":"https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g","reference_id":"GHSA-c5rv-q295-7w4g","reference_type":"","scores":[{"value":"7.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-05-12T12:51:45Z/"}],"url":"https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g"}],"weaknesses":[{"cwe_id":307,"name":"Improper Restriction of Excessive Authentication Attempts","description":"The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks."}],"exploits":[],"severity_range_score":"7.3 - 7.3","exploitability":null,"weighted_severity":null,"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-mtxu-jynh-5qdr"}