CVE-2026-50545

CRITICAL

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

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, 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.

References (4)

Core 4
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/fission/fission/pull/3390
X_Refsource_Misc x_refsource_misc
https://github.com/fission/fission/pull/3391

Scores

CVSS v3 9.9
EPSS 0.0030
EPSS Percentile 21.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-269 CWE-284 CWE-693
Status published
Products (1)
fission/fission < 1.24.0
Published Jun 10, 2026
Tracked Since Jun 11, 2026