Vulnerabilities > CVE-2021-31921 - Missing Authorization vulnerability in Istio

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
istio
CWE-862
critical

Summary

Istio before 1.8.6 and 1.9.x before 1.9.5 contains a remotely exploitable vulnerability where an external client can access unexpected services in the cluster, bypassing authorization checks, when a gateway is configured with AUTO_PASSTHROUGH routing configuration.

Vulnerable Configurations

Part Description Count
Application
Istio
202

Common Weakness Enumeration (CWE)