CVE-2026-50563 Fission Container Executor Function PodSpec Injection Leading to Node Escape
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-50563?
CVE-2026-50563 is a critical vulnerability in fission, published on 10 Jun 2026.
Official description
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.
Which versions are affected by CVE-2026-50563?
3 open source packages ship an affected version, including github.com/fission/fission.
| Package | Affected | Fixed in |
|---|---|---|
github.com/fission/fission Go | All versions | 1.24.0 |
github.com/fission/fission Go | All versions | 1.24.0 |
github.com/fission/fission Go | All versions | 1.24.0 |
How do I fix CVE-2026-50563?
Upgrade github.com/fission/fission to 1.24.0 or later.
Is CVE-2026-50563 being exploited?
There is no known exploitation of CVE-2026-50563 in the wild and no public exploit code.
Sources
Also known as GHSA-v455-mv2v-5g92, GO-2026-5858.