CVE-2026-50545

Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover

State: Published
Severity: 9.9 Critical
Published: Jun 10, 2026
Updated: Jun 12, 2026
Reserved: Jun 4, 2026

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, the Environment.spec.runtime.podSpec / spec.builder.podSpec passthrough lacked validation, and MergePodSpec propagated dangerous fields into the generated pods. This issue has been patched in version 1.24.0.

Scores

CVSS	Score	Vector	Source
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-269 Improper Privilege Management
CWE-284 Improper Access Control
CWE-693 Protection Mechanism Failure

Affected Products

Product	Versions
fissionfission	< 1.24.0Affected

References

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