CVE-2026-50545

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

CVSS 9.9 CRITICALEPSS 0.3%CWE-269 CWE-284 CWE-693

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.9EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

10 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

fission · fission

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References

https://github.com/fission/fission/pull/3390 https://github.com/fission/fission/pull/3391 https://github.com/fission/fission/releases/tag/v1.24.0 https://github.com/fission/fission/security/advisories/GHSA-wmgg-3p4h-48x7