CVE-2026-43914

{"id": "CVE-2026-43914", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43914", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-12T12:51:45.245041Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 3.4, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "dani-garcia", "product": "vaultwarden", "versions": [{"status": "affected", "version": "< 1.35.4"}]}]}], "published": "2026-05-11T23:20:22.253", "references": [{"url": "https://github.com/dani-garcia/vaultwarden/pull/6867", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.4", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-307"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Vaultwarden es un servidor compatible con Bitwarden escrito en Rust. Antes de la versi\u00f3n 1.35.4, existe una vulnerabilidad de seguridad en Vaultwarden que permite eludir la protecci\u00f3n contra fuerza bruta de inicio de sesi\u00f3n si la 2FA por correo electr\u00f3nico est\u00e1 habilitada. Si la 2FA por correo electr\u00f3nico est\u00e1 habilitada, la funci\u00f3n 2FA desprotegida send_email_login (email.rs, endpoint de la API /api/two-factor/send-email-login) tambi\u00e9n act\u00faa como un or\u00e1culo que determina si una combinaci\u00f3n de nombre de usuario y contrase\u00f1a es correcta. Un atacante puede abusar de ese endpoint para realizar ataques de fuerza bruta contra contrase\u00f1as sin limitaci\u00f3n de velocidad. Esto funciona incluso para usuarios que no tienen la 2FA por correo electr\u00f3nico configurada. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 1.35.4."}], "lastModified": "2026-10-26T18:10:00.173", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:dani-garcia:vaultwarden:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3EE3AB66-F61B-479C-A6C3-C2EEEB6FD55A", "versionEndExcluding": "1.35.4"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}