CVE-2026-50564
published 2026-06-10CVE-2026-50564: Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version…
PriorityP259critical9.9CVSS 3.1
AVNACLPRLUINSCCHIHAH
EPSS
0.27%
19.1th 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, Fission's Environment CRD exposes spec.runtime.podSpec and spec.builder.podSpec, which are merged into the Kubernetes pod specs for runtime and builder pods. The merge logic propagated hostNetwork, hostPID, hostIPC, container privileged, and serviceAccountName from the user-supplied podspec with no filtering, and Environment.Validate performed no security-relevant checks on these fields. 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 passthrough enables hostPID/hostNetwork/privileged pods, node escape
ghsa·2026-06-30
CVE-2026-50564 [CRITICAL] CWE-269 Fission Environment CRD podspec passthrough enables hostPID/hostNetwork/privileged pods, node escape
Fission Environment CRD podspec passthrough enables hostPID/hostNetwork/privileged pods, node escape
### Summary
Fission's `Environment` CRD exposes `spec.runtime.podSpec` and `spec.builder.podSpec`, which are merged into the Kubernetes pod specs for runtime and builder pods. The merge logic propagated `hostNetwork`, `hostPID`, `hostIPC`, container
`privileged`, and `serviceAccountName` from the user-supplied podspec with no filtering, and `Environment.Validate` performed no security-relevant checks on these fields.
### Details
A namespace user with `create`/`update` on `environments.fission.io` could produce privileged, host-network, hostPID pods in the Fission function or builder namespace. Because the Helm chart created the `fission-function` and
`fission-builder` namespaces with no
VulDB
Fission up to 1.23.x privileges management (GHSA-gx55-f84r-v3r7)
vuldb·2026-06-10·CVSS 9.9
CVE-2026-50564 [CRITICAL] Fission up to 1.23.x privileges management (GHSA-gx55-f84r-v3r7)
A vulnerability categorized as critical has been discovered in Fission up to 1.23.x. Affected by this vulnerability is an unknown functionality. Such manipulation leads to improper privilege management.
This vulnerability is listed as CVE-2026-50564. The attack may be performed from remote. There is no available exploit.
It is advisable to upgrade the affected component.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-06-10
Published