medium4.5

CVE-2025-52893

OpenBao Inserts Sensitive Information into Log File when processing malformed data

Impact

### 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

Affected packages

Ecosystem	Package	Affected	Fixed in
go	`github.com/openbao/openbao/sdk/v2`	< 2.3.0	2.3.0

Affected products

Vendor	Product	Affected versions
Openbao	Openbao	before 2.3.0

Weakness classification

CWE-532