CVE-2026-39350
Description
Istio is an open platform to connect, manage, and secure microservices. In versions 1.25.0 through 1.27.8, 1.28.0 through 1.28.5, 1.29.0, and 1.29.1, the serviceAccounts and notServiceAccounts fields in AuthorizationPolicy incorrectly interpret dots (.) as a regular expression matcher. Because . is a valid character in a service account name, an AuthorizationPolicy ALLOW rule targeting a service account such as cert-manager.io also matches cert-manager-io, cert-managerXio, etc. A DENY rule targeting the same name fails to block those variants. Fixes are available in versions 1.29.2, 1.28.6, and 1.27.9.
How to fix
- istio istio1.27.9, 1.28.6, 1.29.2 or later
- istio.io/istio0.0.0-20260403004500-692e460c342d or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| istio istio | 1.25.0 ≤ v < 1.27.9, 1.28.0 ≤ v < 1.28.6, 1.29.0 ≤ v < 1.29.2 | 1.27.9, 1.28.6, 1.29.2 |
| istio.io/istioGo | 0.0.0-20241024090207-0bf27d49ba4b ≤ v < 0.0.0-20260403004500-692e460c342d | 0.0.0-20260403004500-692e460c342d |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.