CVE-2025-52893

### Impact OpenBao before v2.3.0 and HashiCorp Vault as of the current v1.19.5 may leak sensitive information in logs when processing malformed data. This is separate from the earlier HCSEC-2025-09 / CVE-2025-4166. ### Patches This issue has been fixed in OpenBao v2.3.0 and later. ### Workarounds Like with HCSEC-2025-09, there is no known workaround except to ensure properly formatted requests from all clients. ### Remediation Users with the capability to search through server and audit logs for any possible exposed secrets can refer to the following snippets to aid in searching: Audit Log ``` ... "error":"error converting input for field \"password\": expected type 'string', got unconvertible type 'map[string]interface {}', value: '<sensitive data>'" ... ``` Server Log ``` error converting input for field "password": expected type 'string', got unconvertible type 'map[string]interface {}', value: '<sensitive data>' ``` If any matches are found, rotating the affected secret is advised. ### References See also: 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/74717 See also: https://github.com/go-viper/mapstructure/releases/tag/v2.3.0 See also: https://github.com/go-viper/mapstructure/pull/105 -> https://github.com/go-viper/mapstructure/commit/ed3f92181528ff776a0324107b8b55026e93766a

OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys. OpenBao before v2.3.0 may leak sensitive information in logs when processing malformed data. This is separate from the earlier HCSEC-2025-09 / CVE-2025-4166. This issue has been fixed in OpenBao v2.3.0 and later. Like with HCSEC-2025-09, there is no known workaround except to ensure properly formatted requests from all clients.

OpenBao Inserts Sensitive Information into Log File when processing malformed data in github.com/openbao/openbao/sdk