CVE-2026-42875: External-Secrets

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.0, Namespaced SecretStore resources that used CAProvider with type ConfigMap could resolve CA material from another namespace when caProvider.namespace was set. This bypassed the namespace boundary enforced for SecretStore-backed references in providers that rely on the shared runtime CA resolver. This vulnerability is fixed in 2.4.0.

Affected products

• External-Secrets External-Secrets: before 2.4.0 (fixed in 2.4.0)

Published 2026-05-11. Last modified 2026-06-17.