CVE-2026-50565

MEDIUM

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

Title source: cna
STIX 2.1

Description

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.

References (3)

Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/fission/fission/pull/3390

Scores

CVSS v3 4.9
EPSS 0.0026
EPSS Percentile 16.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-250 CWE-269 CWE-538
Status published
Products (1)
fission/fission < 1.24.0
Published Jun 10, 2026
Tracked Since Jun 11, 2026