CVE-2021-28156: Hashicorp Consul

High severity, CVSS 7.5. EPSS: 2.3% chance of exploitation in the next 30 days.

HashiCorp Consul Enterprise version 1.8.0 up to 1.9.4 audit log can be bypassed by specifically crafted HTTP events. Fixed in 1.9.5, and 1.8.10.

Affected products

• Hashicorp Consul: from 1.8.0, before 1.8.10 (fixed in 1.8.10); from 1.9.0, before 1.9.5 (fixed in 1.9.5)

Published 2021-04-20. Last modified 2026-06-17.