CVE-2021-36213: Hashicorp Consul

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. Fixed in 1.9.8 and 1.10.1.

Affected products

• Hashicorp Consul: from 1.9.0, before 1.9.8 (fixed in 1.9.8); from 1.10.0, before 1.10.1 (fixed in 1.10.1)

Published 2021-07-17. Last modified 2026-06-17.