---
title: "CVE-2026-46614: Fission router exposes /fission-function/<ns>/<name> on its public listener, allowing invocation of any function without an HTTPTrigger"
url: https://erroneo.us/security/cve/CVE-2026-46614/
description: "CVE-2026-46614 (github.com/fission/fission (Go)): Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-10
date_modified: 2026-06-11
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-46614"
kev: false
cvss: 9.8
epss: 0.00652
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-46614: Fission router exposes /fission-function/<ns>/<name> on its public listener, allowing invocation of any function without an HTTPTrigger

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.7% , percentile 51: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 51% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/fission/fission (Go) <= 1.22.0, fixed in 1.23.0 . Check your lockfile, including transitive dependencies.

## What it is

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/ and /fission-function/ / — 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.

## Affected packages

- Go `github.com/fission/fission` <= 1.22.0 → fixed: 1.23.0

## Affected products (CVE record)

- fission fission: < 1.23.0

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.65% probability of exploitation activity in the next 30 days; percentile 51.

## Sources

- [GitHub Advisory GHSA-3g33-6vg6-27m8](https://github.com/advisories/GHSA-3g33-6vg6-27m8)
- [CVE.org record CVE-2026-46614](https://www.cve.org/CVERecord?id=CVE-2026-46614)
- [NVD entry CVE-2026-46614](https://nvd.nist.gov/vuln/detail/CVE-2026-46614)
- [github.com](https://github.com/fission/fission/security/advisories/GHSA-3g33-6vg6-27m8)
- [github.com](https://github.com/fission/fission/pull/3365)
- [github.com](https://github.com/fission/fission/pull/3369)
- [github.com](https://github.com/fission/fission/releases/tag/v1.23.0)

---
Source page: https://erroneo.us/security/cve/CVE-2026-46614/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt