CVE-2025-4166

Vault May Include Sensitive Data in Error Logs When Using the KV v2 Plugin

State: Published
Severity: 4.5 Medium
Published: May 2, 2025
Updated: May 8, 2025
Reserved: Apr 30, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	4.5 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N	HashiCorp

Weaknesses

CWE-209 Generation of Error Message Containing Sensitive Information

Affected Products

Product	Versions
VaultHashiCorp	0.3.0 to before 1.19.2Affected
Vault EnterpriseHashiCorp	0.10.0 to before 1.19.2Affectedfrom 1.18.9Not affectedfrom 1.17.16Not affectedfrom 1.16.20Not affected

References

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

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