{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-27898", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-24T15:19:29.717Z", "datePublished": "2026-03-04T21:44:45.461Z", "dateUpdated": "2026-03-05T15:42:31.635Z"}, "containers": {"cna": {"title": "Vaultwarden: Unauthorized Access via Partial Update API on Another User\u2019s Cipher", "problemTypes": [{"descriptions": [{"cweId": "CWE-639", "lang": "en", "description": "CWE-639: Authorization Bypass Through User-Controlled Key", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-w9f8-m526-h7fh", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-w9f8-m526-h7fh"}], "affected": [{"vendor": "dani-garcia", "product": "vaultwarden", "versions": [{"version": "< 1.35.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-04T21:44:45.461Z"}, "descriptions": [{"lang": "en", "value": "Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, an authenticated regular user can specify another user\u2019s cipher_id and call \"PUT /api/ciphers/{id}/partial\" Even though the standard retrieval API correctly denies access to that cipher, the partial update endpoint returns 200 OK and exposes cipherDetails (including name, notes, data, secureNote, etc.). This issue has been patched in version 1.35.4."}], "source": {"advisory": "GHSA-w9f8-m526-h7fh", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-05T15:29:18.966051Z", "id": "CVE-2026-27898", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-05T15:42:31.635Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-27898", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-05T15:29:18.966051Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-05T15:29:19.983Z"}}], "cna": {"title": "Vaultwarden: Unauthorized Access via Partial Update API on Another User\u2019s Cipher", "source": {"advisory": "GHSA-w9f8-m526-h7fh", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "dani-garcia", "product": "vaultwarden", "versions": [{"status": "affected", "version": "< 1.35.4"}]}], "references": [{"url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-w9f8-m526-h7fh", "name": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-w9f8-m526-h7fh", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, an authenticated regular user can specify another user\u2019s cipher_id and call \"PUT /api/ciphers/{id}/partial\" Even though the standard retrieval API correctly denies access to that cipher, the partial update endpoint returns 200 OK and exposes cipherDetails (including name, notes, data, secureNote, etc.). This issue has been patched in version 1.35.4."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-639", "description": "CWE-639: Authorization Bypass Through User-Controlled Key"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-04T21:44:45.461Z"}}}, "cveMetadata": {"cveId": "CVE-2026-27898", "state": "PUBLISHED", "dateUpdated": "2026-03-05T15:42:31.635Z", "dateReserved": "2026-02-24T15:19:29.717Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-03-04T21:44:45.461Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, an authenticated regular user can specify another user\u2019s cipher_id and call \"PUT /api/ciphers/{id}/partial\" Even though the standard retrieval API correctly denies access to that cipher, the partial update endpoint returns 200 OK and exposes cipherDetails (including name, notes, data, secureNote, etc.). This issue has been patched in version 1.35.4."}], "id": "CVE-2026-27898", "lastModified": "2026-03-04T22:16:18.373", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-04T22:16:18.373", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-w9f8-m526-h7fh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{"bugzilla": {"description": "vaultwarden: Vaultwarden: Information disclosure via API partial update", "id": "2444681", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2444681"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-639", "details": ["No description is available for this CVE."], "name": "CVE-2026-27898", "public_date": "2026-03-04T21:44:45Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-27898\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-27898\nhttps://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-w9f8-m526-h7fh"], "statement": "This MODERATE information disclosure vulnerability in Vaultwarden allows an authenticated user to retrieve another user's cipher details via the partial update API endpoint (CWE-639 IDOR). Exploitation requires network access and valid authentication (PR:L). Impact is limited to high confidentiality loss (exposure of names, notes, secure notes); no integrity or availability impact. Affects versions prior to 1.35.4. Red Hat does not ship Vaultwarden.", "threat_severity": "Moderate"}