CVE-2026-49823CWE-284CWE-863

Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook

High · published June 10, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
36.9
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, a Fission Function spec carries three reference types — Secret, ConfigMap, and Package. The first two were namespace-validated by the admission webhook; PackageRef.Namespace was not. This issue has been patched in version 1.24.0.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00437 · 36.9th percentile
Weaknesses
CWE-284 · Improper Access Control; CWE-863 · Incorrect Authorization
Published
2026-06-10T17:23Z
EPSS history
Timeline
  • 10 JUN 17:23Z
    Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook
    cvelistv5