CVE-2021-27400: Hashicorp Vault

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1

Affected products

• Hashicorp Vault: before 1.6.4 (fixed in 1.6.4); from 1.7.0, before 1.7.1 (fixed in 1.7.1)

Published 2021-04-22. Last modified 2026-06-17.