{"id":"CVE-2026-43914","summary":"Vaultwarden: Brute-force protection bypass vulnerability","details":"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":["GHSA-c5rv-q295-7w4g"],"modified":"2026-07-15T01:49:04.216258059Z","published":"2026-05-11T22:03:58.456Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43914.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-307"]},"references":[{"type":"WEB","url":"https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43914.json"},{"type":"ADVISORY","url":"https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43914"},{"type":"FIX","url":"https://github.com/dani-garcia/vaultwarden/pull/6867"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dani-garcia/vaultwarden","events":[{"introduced":"0"},{"fixed":"c555f7d1980c8ab3ac8d64b0297e47c621590368"}],"database_specific":{"cpe":"cpe:2.3:a:dani-garcia:vaultwarden:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.35.4"}],"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"]}}],"versions":["1.35.3","1.35.2","1.35.1","1.35.0","1.34.3","1.34.2","1.34.1","1.34.0","1.33.2","1.33.1","1.33.0","1.32.7","1.32.6","1.32.5","1.32.4","1.32.3","1.32.2","1.32.1","1.32.0","1.31.0","1.30.5","1.30.4","1.30.3","1.30.2","1.30.1","1.30.0","1.29.2","1.29.1","1.29.0","1.28.1","1.28.0","1.27.0","1.26.0","1.25.2","1.25.1","1.25.0","1.24.0","1.23.1","1.23.0","1.22.2","1.22.1","1.22.0","1.21.0","1.20.0","1.19.0","1.18.0","1.17.0","1.16.3","1.16.2","1.16.1","1.16.0","1.15.1","1.15.0","1.14.2","1.14.1","1.14","1.13.1","1.13.0","1.12.0","1.11.0","1.10.0","1.9.1","1.9.0","1.8.0","1.7.0","1.6.1","1.6.0","1.5.0","1.4.0","1.3.0","1.2.0","1.1.0","1.0.0","0.13.0","0.12.0","0.11.0","0.10.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43914.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}