CVE-2026-50565 MEDIUM

CVE-2026-50565: Fission builder pods auto-mount the fission-builder ServiceAccount token in the user-supplied builder container

Vendor Fission
Product fission
Weakness CWE-250
Published June 10, 2026
Last update June 10, 2026
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

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, Fission builder pods were created with ServiceAccountName: fission-builder and no AutomountServiceAccountToken: false, so the kubelet auto-mounted the service-account token into every container in the pod — including the user-supplied builder image. This issue has been patched in version 1.24.0.

Key dates

02Disclosure timeline

June 10, 2026 CVE published
June 10, 2026 Record updated