Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover
CVE-2026-50545

9.9CRITICAL

Key Information:

Vendor

Fission

Status
Fission
Vendor
CVE Published:
10 June 2026

What is CVE-2026-50545?

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.

Affected Version(s)

fission < 1.24.0

References

https://github.com/fission/fission/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/fission/fission/pull/3390
x_refsource_MISC
https://github.com/fission/fission/pull/3391
x_refsource_MISC

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.