CVE-2026-50545
published 2026-06-10CVE-2026-50545: Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version…
PriorityP260critical9.9CVSS 3.1
AVNACLPRLUINSCCHIHAH
EPSS
0.30%
21.5th percentile
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
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| fission | fission | < 1.24.0 | 1.24.0 |
| github.com | fission_fission | >= 0 < 1.24.0 | 1.24.0 |
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GHSA
Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover
ghsa·2026-06-30
CVE-2026-50545 [CRITICAL] CWE-269 Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover
Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover
### Summary
A stronger framing of the same root cause as GHSA-gx55-f84r-v3r7: the `Environment.spec.runtime.podSpec` / `spec.builder.podSpec` passthrough lacked validation, and `MergePodSpec` propagated dangerous fields into the generated pods.
### Details
Three independent flaws compounded:
1. **Validate gap.** `pkg/apis/core/v1/validation.go::Environment.Validate` checked only container naming conventions, never `hostPID`/`hostIPC`/`hostNetwork`/`hostPath`/`privileged`.
2. **UPDATE bypass.** The `pkg/webhook/environment.go` kubebuilder marker registered `verbs=create` only. A tenant could `kubectl apply` a clean Environment and then `kubectl patch` in the dangerous fields — the webhook was never ca
VulDB
Fission up to 1.23.x privileges management (GHSA-wmgg-3p4h-48x7)
vuldb·2026-06-10·CVSS 9.9
CVE-2026-50545 [CRITICAL] Fission up to 1.23.x privileges management (GHSA-wmgg-3p4h-48x7)
A vulnerability was found in Fission up to 1.23.x. It has been declared as critical. This impacts an unknown function. The manipulation results in improper privilege management.
This vulnerability is identified as CVE-2026-50545. The attack can be executed remotely. There is not any exploit available.
It is recommended to upgrade the affected component.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-06-10
Published