Moderate severityNVD Advisory· Published May 2, 2025· Updated May 8, 2025

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

CVE-2025-4166

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.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
github.com/hashicorp/vaultGo	>= 0.3.0, < 1.19.3	1.19.3

Affected products

Hashicorp/Vaultv5
Range: 0.3.0
HashiCorp/Vault Enterprisev5
Range: 0.10.0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

github.com/advisories/GHSA-gcqf-f89c-68hvghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2025-4166ghsaADVISORY
discuss.hashicorp.com/t/hcsec-2025-09-vault-may-expose-sensitive-information-in-error-logs-when-processing-malformed-data-with-the-kv-v2-pluginghsaWEB
pkg.go.dev/vuln/GO-2025-3663ghsaWEB

News mentions

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cvss	0.260
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