{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43914", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-04T16:11:33.086Z", "datePublished": "2026-05-11T22:03:58.456Z", "dateUpdated": "2026-05-11T22:03:58.456Z"}, "containers": {"cna": {"title": "Vaultwarden: Brute-force protection bypass vulnerability", "problemTypes": [{"descriptions": [{"cweId": "CWE-307", "lang": "en", "description": "CWE-307: Improper Restriction of Excessive Authentication Attempts", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g"}, {"name": "https://github.com/dani-garcia/vaultwarden/pull/6867", "tags": ["x_refsource_MISC"], "url": "https://github.com/dani-garcia/vaultwarden/pull/6867"}, {"name": "https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.4"}], "affected": [{"vendor": "dani-garcia", "product": "vaultwarden", "versions": [{"version": "< 1.35.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-11T22:03:58.456Z"}, "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."}], "source": {"advisory": "GHSA-c5rv-q295-7w4g", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-43914", "lastModified": "2026-05-11T23:20:22.253", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-11T23:20:22.253", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/dani-garcia/vaultwarden/pull/6867"}, {"source": "security-advisories@github.com", "url": "https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-c5rv-q295-7w4g"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-307"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.35.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "vaultwarden", "source": "cna", "vendor": "dani-garcia"}, "product": "vaultwarden", "vendor": "dani-garcia"}], "created": "2026-05-11T23:45:02.882037+00:00", "updated": "2026-05-12T00:15:07.378422+00:00", "vendors": ["dani-garcia", "dani-garcia$PRODUCT$vaultwarden"]}