CVE-2025-6037

MEDIUM

Vault <1.20.1 - Auth Bypass

Title source: llm

Description

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.

References (1)

[Vendor Advisory] https://discuss.hashicorp.com/t/hcsec-2025-18-vault-certificate-auth-method-did-not-validate-common-name-for-non-ca-certificates/76037

Scores

CVSS v3 6.8

EPSS 0.0006

EPSS Percentile 18.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-295

Status published

Products (4)

hashicorp/vault 1.20.0

hashicorp/vault < 1.16.23

hashicorp/vault < 1.20.1

hashicorp/vault 0 - 1.20.1Go

Published Aug 01, 2025

Tracked Since Feb 18, 2026