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

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Summary

CVECVE-2026-50565
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-10 18:17:12 UTC
Updated2026-06-10 18:17:12 UTC
DescriptionFission 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.

Risk And Classification

Primary CVSS: v3.1 4.9 MEDIUM from [email protected]

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

Problem Types: CWE-250 | CWE-269 | CWE-538 | CWE-250 CWE-250: Execution with Unnecessary Privileges | CWE-269 CWE-269: Improper Privilege Management | CWE-538 CWE-538: Insertion of Sensitive Information into Externally-Accessible File or Directory

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.9MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED4.9MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fission Fission affected < 1.24.0 Not specified

References

ReferenceSourceLinkTags
github.com/fission/fission/pull/3390 [email protected] github.com
github.com/fission/fission/releases/tag/v1.24.0 [email protected] github.com
github.com/fission/fission/security/advisories/GHSA-8wcj-mfrc-jx5q [email protected] github.com
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