CVE-2026-78427 MEDIUM

CVE-2026-78427: Admission Control Bypass via Hardcoded Sidecar Image Exemption

Vendor Go
Product github.com/neuvector/neuvector
Weakness CWE-807
Published September 17, 2026
Last update September 17, 2026

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

The NeuVector admission webhook silently excludes containers from policy evaluation when their image path matches one of three hardcoded service mesh sidecar images. Since the image path is entirely controlled by the workload author, any user capable of deploying workloads can evade admission deny rules simply by naming their image path after one of these sidecar images.

Key dates

02Disclosure timeline

September 17, 2026 CVE published