CVE-2026-122313 Kyverno 1.17.0 before 1.19.2 Cross-Namespace Privilege Escalation via NamespacedMutatingPolicy
CriticalCVSS 9.4
- Published
- Updated
- Exploit status
- No public exploit known
Description
Kyverno from 1.17.0 before 1.19.2 contains a privilege escalation vulnerability that allows namespace-scoped tenants to modify resources in other namespaces through NamespacedMutatingPolicy targetMatchConstraints.expression CEL output lacking namespace checks. Attackers can emit a literal target such as another tenant's RoleBinding, which the cluster-wide background controller then mutates to add attacker subjects or alter Roles, NetworkPolicies, and ConfigMaps.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kyverno | >= 1.17.0, < 1.19.2 | 1.19.2 |