CVE-2025-4166

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.

Score

CVSS 3.1 6.5 Medium

Status

Analyzed - security@hashicorp.com

Published

2025-05-02

Last modified

2025-05-08

Weaknesses

CWE-209

Affected products

• Vault (Hashicorp)
• Vault Enterprise (Hashicorp)
• Openbao (Openbao)

References

• https://discuss.hashicorp.com/t/hcsec-2025-09-vault-may-expose-sensitive-information-in-error-logs-when-processing-malf…