CVE-2026-49823 HIGH

CVE-2026-49823: Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook

Vendor Fission
Product fission
Weakness CWE-284
Published June 10, 2026
Last update June 10, 2026
View on NVD All CVEs

CVSS base score

7.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 10, 2026 CVE published
June 10, 2026 Record updated