CVE-2026-50545 PUBLISHED

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

Assigner: GitHub_M
Reserved: 04.06.2026 Published: 10.06.2026 Updated: 10.06.2026

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.

Metrics

CVSS 3.1

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

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

CVSS 3.1

Product Status

Vendor	fission
Product	fission
Versions	Version < 1.24.0 is affected

References

Problem Types

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