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

4.9MEDIUM

Key Information:

Vendor

Fission

Status
Fission
Vendor
CVE Published:
10 June 2026

What is CVE-2026-50565?

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.

Affected Version(s)

fission < 1.24.0

References

https://github.com/fission/fission/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/fission/fission/pull/3390
x_refsource_MISC
https://github.com/fission/fission/releases/tag/v1.24.0
x_refsource_MISC

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.