CVE-2026-50566: Fission

Critical severity, CVSS 9.9. EPSS: 0.5% chance of exploitation in the next 30 days.

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, a tenant with environments.fission.io create/update RBAC can run privileged / allowPrivilegeEscalation / dangerous-capability containers in the Fission function or builder namespace, scheduled under the executor's high-privilege service account — enabling container-sandbox escape, host filesystem and network access, and potential node- and cluster-level compromise. This issue has been patched in version 1.24.0.

Affected products

• Fission Fission: before 1.24.0 (fixed in 1.24.0)

Published 2026-06-10. Last modified 2026-06-17.