CVE-2026-46614 Fission router exposes /fission-function/<ns>/<name> on its public listener, allowing invocation of any function without an HTTPTrigger
Attackers can invoke any Fission function by guessing its name, bypassing HTTPTrigger restrictions and potentially executing unauthorized code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46614?
CVE-2026-46614 is a critical missing authorization 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, the Fission router registers an internal-style route — /fission-function/<name> and /fission-function/<ns>/<name> — for every Function object, independent of whether any HTTPTrigger exists for that function. The route was mounted on the same listener as user-defined HTTPTriggers (svc/router, port 8888), so any caller who could reach the router could invoke any function by guessing its metadata.name (and namespace), bypassing the host / path / method / method-allow-list restrictions encoded in HTTPTrigger objects. This issue has been patched in version 1.23.0.
Which versions are affected by CVE-2026-46614?
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-2026-46614?
Upgrade github.com/fission/fission to 1.23.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-46614 being exploited?
There is no known exploitation of CVE-2026-46614 in the wild and no public exploit code.
Sources
Also known as GHSA-3g33-6vg6-27m8, GO-2026-5082.