CVE-2026-27801

Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Vaultwarden versions 1.34.3 and prior are susceptible to a 2FA bypass when performing protected actions. An attacker who gains authenticated access to a user’s account can exploit this bypass to perform protected actions such as accessing the user’s API key or deleting the user’s vault and organisations the user is an admin/owner of . This issue has been patched in version 1.35.0.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-v6pg-v89r-w8wr	Exploit Mitigation Vendor Advisory
https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-v6pg-v89r-w8wr	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:dani-garcia:vaultwarden:*:*:*:*:*:*:*:*

History

06 Mar 2026, 19:45

Type	Values Removed	Values Added
First Time		Dani-garcia vaultwarden Dani-garcia
References	~~() https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-v6pg-v89r-w8wr -~~	() https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-v6pg-v89r-w8wr - Exploit, Mitigation, Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.9
CPE		cpe:2.3:a:dani-garcia:vaultwarden::::::::

05 Mar 2026, 16:16

Type	Values Removed	Values Added
References	~~() https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-v6pg-v89r-w8wr -~~	() https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-v6pg-v89r-w8wr -

04 Mar 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-04 22:16

Updated : 2026-03-06 19:45

NVD link : CVE-2026-27801

Mitre link : CVE-2026-27801

CVE.ORG link : CVE-2026-27801

JSON object : View

Products Affected

dani-garcia

vaultwarden

CWE

CWE-307

Improper Restriction of Excessive Authentication Attempts

{"id": "CVE-2026-27801", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 4.2, "exploitabilityScore": 1.6}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.0, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-03-04T22:16:17.897", "references": [{"url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-v6pg-v89r-w8wr", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-v6pg-v89r-w8wr", "tags": ["Exploit", "Mitigation", "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 an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Vaultwarden versions 1.34.3 and prior are susceptible to a 2FA bypass when performing protected actions. An attacker who gains authenticated access to a user\u2019s account can exploit this bypass to perform protected actions such as accessing the user\u2019s API key or deleting the user\u2019s vault and organisations the user is an admin/owner of . This issue has been patched in version 1.35.0."}], "lastModified": "2026-03-06T19:45:34.347", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:dani-garcia:vaultwarden:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7E2621A9-90DC-46B4-950C-FAC2EE6A6A50", "versionEndExcluding": "1.35.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}