Report: Update: CVE-2026-42876 - External Secrets Operator: Priviledge escalation with secret overwriting

Report: Update: CVE-2026-42876 - External Secrets Operator: Priviledge escalation with secret overwriting

CVE ID :CVE-2026-42876 Published : May 11, 2026, 8:25 p.m. | 36 minutes ago Description :External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Prior to 2.4.1, a user who only has permission to create ExternalSecret resources can cause the operator to create a Secret that Kubernetes will automatically populate with a long-lived token for the specified service account. This effectively allows the user to impersonate any service account in the namespace without needing direct create permissions on TokenRequest or Secrets of that type. This vulnerability is fixed in 2.4.1. Severity: 4.9 | MEDIUM Visit the link for more details, such as CVSS details, affected products, timeline, and more...

CVE Details

Severity
MEDIUM
Published
May 11, 2026
Affected Product: Kubernetes