CVE-2020-8595: Istio

High severity, CVSS 7.3. EPSS: 2.6% chance of exploitation in the next 30 days.

Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 allows authentication bypass. The Authentication Policy exact-path matching logic can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token. For example, an attacker can add a ? or # character to a URI that would otherwise satisfy an exact-path match.

Affected products

• Istio Istio: from 1.3, up to and including 1.3.7; from 1.4.0, up to and including 1.4.3
• Red Hat Openshift Service Mesh: version 1.0 only

Published 2020-02-12. Last modified 2026-06-17.