CVE-2026-49824CWE-284CWE-863

Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook

High · published June 10, 2026

CVSS v3.1
8.5
EPSS
0%
Percentile
31.7
In the wild
Unconfirmed
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 1.24.0, the Fission Function admission webhook (pkg/webhook/function.go) validated that spec.secrets[].namespace and spec.configmaps[].namespace equalled the function's own namespace but performed no equivalent check on spec.environment.namespace. This issue has been patched in version 1.24.0.

The record
Technical detail
CVSS v3.1
8.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00388 · 31.7th percentile
Weaknesses
CWE-284 · Improper Access Control; CWE-863 · Incorrect Authorization
Published
2026-06-10T17:25Z
EPSS history
Timeline
  • 10 JUN 17:25Z
    Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook
    cvelistv5