CVE-2026-50545CWE-269CWE-284CWE-693

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

Critical · published June 10, 2026

CVSS v3.1
9.9
EPSS
1%
Percentile
43.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.9 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00523 · 43.5th percentile
Weaknesses
CWE-269 · Improper Privilege Management; CWE-284 · Improper Access Control; CWE-693 · Protection Mechanism Failure
Published
2026-06-10T17:26Z
EPSS history
Timeline
  • 10 JUN 17:26Z
    Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover
    cvelistv5