by Kastro
Paper/Archive/CVE-2026-50563

CVE-2026-50563

fission fission — Fission Container Executor Function PodSpec Injection Leading to Node Escape

EPSS 0.3%CVSS 9.9
critical.is priorityof 100
34
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 19.9.199 × 204.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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, Fission's Container Executor path lets a tenant supply Function.spec.podspec directly; the executor merges it into the executor-built podspec and creates a Deployment whose pods run the user's container image. This issue has been patched in version 1.24.0.

Affected

ProductAffectedFixed inSource
fission< 1.24.0–CNA

Scores by source

GitHub_M (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/fission/fission/security/advisories/GHSA-v455-mv2v-5g92refgithub.com/fission/fission/pull/3391refgithub.com/fission/fission/releases/tag/v1.24.0