CVE-2025-6037: Hashicorp Vault

Medium severity, CVSS 6.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Vault and Vault Enterprise (“Vault”) TLS certificate auth method did not correctly validate client certificates when configured with a non-CA certificate as [+trusted certificate+|https://developer.hashicorp.com/vault/api-docs/auth/cert#certificate]. In this configuration, an attacker may be able to craft a malicious certificate that could be used to impersonate another user. Fixed in Vault Community Edition 1.20.1 and Vault Enterprise 1.20.1, 1.19.7, 1.18.12, and 1.16.23.

Affected products

• Hashicorp Vault: before 1.16.23 (fixed in 1.16.23); before 1.20.1 (fixed in 1.20.1); from 1.17.0, before 1.18.12 (fixed in 1.18.12); from 1.19.0, before 1.19.7 (fixed in 1.19.7); version 1.20.0 only

Published 2025-08-01. Last modified 2026-06-17.