CVE-2026-46617 Fission runtime pods automount the fission-fetcher service-account token into the user function container, granting function code namespace-wide secret / configmap read
User function code inherits fetcher service account privileges, allowing unauthorized reading of all secrets and configmaps in the namespace.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46617?
CVE-2026-46617 is a high-severity vulnerability in fission, published on 10 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.23.0, Fission runtime pods were created with ServiceAccountName: fission-fetcher, and the fission-fetcher ServiceAccount was granted namespace-wide get on secrets and configmaps (it needs that to load function code, env vars, and config). The runtime pod's automounted token was reachable from inside the user's function container at /var/run/secrets/kubernetes.io/serviceaccount/token, so user-supplied function code inherited the same Kubernetes API privileges and could read any secret or configmap in the function's namespace — far beyond the Function.spec.secrets allowlist that the function specification suggests. This issue has been patched in version 1.23.0.
Which versions are affected by CVE-2026-46617?
3 open source packages ship an affected version, including github.com/fission/fission.
| Package | Affected | Fixed in |
|---|---|---|
github.com/fission/fission Go | All versions | 1.23.0 |
github.com/fission/fission Go | All versions | 1.23.0 |
github.com/fission/fission Go | All versions | 1.23.0 |
How do I fix CVE-2026-46617?
Upgrade github.com/fission/fission to 1.23.0 or later.
Is CVE-2026-46617 being exploited?
There is no known exploitation of CVE-2026-46617 in the wild and no public exploit code.
Sources
Also known as GHSA-85g2-pmrx-r49q, GO-2026-5241.