MEDIUM6.8

GHSA-6c5r-4wfc-3mcx

Hashicorp Vault has Incorrect Validation for Non-CA Certificates

Quick fix

GHSA-6c5r-4wfc-3mcx — github.com/hashicorp/vault: upgrade to the fixed version with the command below.

go get github.com/hashicorp/vault@v1.20.1

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

Go/github.com/hashicorp/vault

Introduced in: 0Fixed in: 1.20.1

Fixgo get github.com/hashicorp/vault@v1.20.1

References

https://nvd.nist.gov/vuln/detail/CVE-2025-6037[ADVISORY]
https://discuss.hashicorp.com/t/hcsec-2025-18-vault-certificate-auth-method-did-not-validate-common-name-for-non-ca-certificates/76037[WEB]
https://github.com/hashicorp/vault[PACKAGE]