CVE-2020-16844: Istio

Medium severity, CVSS 6.8. EPSS: 1.1% chance of exploitation in the next 30 days.

In Istio 1.5.0 though 1.5.8 and Istio 1.6.0 through 1.6.7, when users specify an AuthorizationPolicy resource with DENY actions using wildcard suffixes (e.g. *-some-suffix) for source principals or namespace fields, callers will never be denied access, bypassing the intended policy.

Affected products

• Istio Istio: from 1.5.0, up to and including 1.5.8; from 1.6.0, up to and including 1.6.7

Published 2020-10-01. Last modified 2026-06-17.