What’s Vulnerable › Vulnerabilities
CVE-2026-42875: External Secrets Operator: Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStore
- Severity: medium (CVSS 5.3 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-11 · updated 2026-06-17
- Weakness: CWE-285
Description
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: before 2.4.0
References
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