{"schema_version":"1.9.0","id":"CVE-2025-4166","published":"2025-05-02T14:57:58.710Z","modified":"2026-08-12T03:51:30.594627101Z","aliases":["BIT-openbao-2025-4166","BIT-vault-2025-4166","GHSA-gcqf-f89c-68hv","GO-2025-3663"],"related":["CGA-3phg-7q62-wrfp","openSUSE-SU-2025:15059-1","openSUSE-SU-2025:15186-1"],"summary":"Vault May Include Sensitive Data in Error Logs When Using the KV v2 Plugin","details":"Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hashicorp/vault","events":[{"introduced":"347f48c55bae0fa7a36d8eae6028de9a6eeefc01"},{"fixed":"a2de3bb7bcf4a073cbb8724863a5a88d3c2f83da"},{"introduced":"7eeafb6160d60ede73c1d95566b0c8ea54f3cb5a"},{"fixed":"a2de3bb7bcf4a073cbb8724863a5a88d3c2f83da"}],"database_specific":{"cpe":["cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*","cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*"],"extracted_events":[{"introduced":"0.3.0"},{"fixed":"1.19.3"},{"introduced":"1.19.0"}],"source":"CPE_RANGE"}},{"type":"GIT","repo":"https://github.com/openbao/openbao","events":[{"introduced":"0"},{"fixed":"8c0322c0423231836a1432fdad29dc2e99640da9"}],"database_specific":{"cpe":"cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.2.2"}],"source":"CPE_RANGE"}}],"versions":["v1.19.2","v1.19.1","v1.19.0","v2.2.1","v2.2.0","v2.2.0-beta20250213","sdk/v2.2.0","api/v2.2.0","api/auth/userpass/v2.2.0","api/auth/ldap/v2.2.0","api/auth/kubernetes/v2.2.0","api/auth/approle/v2.2.0","v2.1.0-beta20241114.3","v2.1.0-beta20241114.2","v2.1.0-beta20241114.1","v2.1.0-beta20241114","sdk/v2.1.0","api/v2.1.0","v2.0.0","sdk/v2.0.1","api/v2.0.1","api/auth/userpass/v2.0.1","api/auth/ldap/v2.0.1","api/auth/kubernetes/v2.0.1","api/auth/approle/v2.0.1","v2.0.0-beta20240618","sdk/v1.100.0-development20240408","api/v1.100.0-development20240408","api/auth/userpass/v1.1.0-development20240408","api/auth/ldap/v1.1.0-development20240408","api/auth/kubernetes/v1.1.0-development20240408","api/auth/gcp/v1.1.0-development20240408","api/auth/azure/v1.1.0-development20240408","api/auth/aws/v1.1.0-development20240408","api/auth/approle/v1.1.0-development20240408","v2.0.0-alpha20240329","before-plugin-removal","api/auth/userpass/v0.4.1","api/auth/gcp/v0.4.1","api/auth/azure/v0.4.1","api/auth/aws/v0.4.1","api/auth/approle/v0.4.1","sdk/v0.9.1","api/v1.9.2","api/v1.9.1","sdk/v0.9.0","api/auth/userpass/v0.4.0","api/auth/gcp/v0.4.0","api/auth/azure/v0.4.0","api/auth/aws/v0.4.0","api/auth/approle/v0.4.0","sdk/v0.8.0","api/v1.9.0","api/v1.8.3","sdk/v0.7.0","sdk/v0.6.2","sdk/v0.6.1","api/v1.8.2","api/v1.8.1","api/auth/userpass/v0.3.0","api/auth/gcp/v0.3.0","api/auth/azure/v0.3.0","api/auth/aws/v0.3.0","api/auth/approle/v0.3.0","api/v1.8.0","sdk/v0.6.0","api/auth/userpass/v0.2.0","api/auth/gcp/v0.2.0","api/auth/azure/v0.2.0","api/auth/aws/v0.2.0","api/auth/approle/v0.2.0","sdk/v0.5.3","api/v1.7.2","sdk/v0.5.1","api/v1.7.1","api/v1.7.0","api/v1.6.0","sdk/v0.5.0","api/v1.5.0","sdk/v0.4.1","api/v1.3.1","api/auth/approle/v0.1.1","api/auth/gcp/v0.1.0","api/auth/azure/v0.1.0","api/auth/userpass/v0.1.0","api/auth/aws/v0.1.0","api/auth/approle/v0.1.0","sdk/v0.3.0","api/v1.2.0","api/v1.1.1","sdk/v0.2.1","api/v1.0.4","sdk/v0.1.13","api/v1.0.3","sdk/v0.1.12","sdk/v0.1.11","sdk/v0.1.10","api/v1.0.2","sdk/v0.1.9","api/v1.0.1","sdk/v0.1.8"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-4166.json"}}],"references":[{"type":"WEB","url":"https://discuss.hashicorp.com/t/hcsec-2025-09-vault-may-expose-sensitive-information-in-error-logs-when-processing-malformed-data-with-the-kv-v2-plugin"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/4xxx/CVE-2025-4166.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-4166"},{"type":"PACKAGE","url":"https://github.com/hashicorp/vault"}],"database_specific":{"cna_assigner":"HashiCorp","cwe_ids":["CWE-209"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/4xxx/CVE-2025-4166.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N"}]}