CVE-2026-49823

HIGH

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

Title source: cna
STIX 2.1

Description

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.

References (3)

Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/fission/fission/pull/3389

Scores

CVSS v3 7.7
EPSS 0.0027
EPSS Percentile 17.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-284 CWE-863
Status published
Products (1)
fission/fission < 1.24.0
Published Jun 10, 2026
Tracked Since Jun 11, 2026