CVE-2026-50564

Critical

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's Environment CRD exposes spec.runtime.podSpec and spec.builder.podSpec, which are merged into the Kubernetes pod specs for runtime and builder pods. The merge logic propagated hostNetwork, hostPID, hostIPC, container privileged, and serviceAccountName from the user-supplied podspec with no filtering, and Environment.Validate performed no security-relevant checks on these fields. This issue has been patched in version 1.24.0.

SeverityCritical

CVSS9.9

Exploit probability20. percentile0.3%

ProductGithub.com/fission/fission

PublishedJun 10, 2026

First seenJun 10, 2026

Weakness typeCWE-269Improper privilege management CWE-284Improper access control CWE-693CWE-693

How to fix

Update

github.com/fission/fission1.24.0 or later

Affected products

Product	Affected versions	Fixed in
github.com/fission/fissionGo	v < 1.24.0	1.24.0

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