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GHSA-8f5r-8cmq-7fmq
No affected components available
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
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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