What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-09-28
• Weakness: CWE-807

Description

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.

Affected products

• SUSE github.com/neuvector/neuvector: through v5.6.1

References

• https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-78427
• https://github.com/neuvector/neuvector/security/advisories/GHSA-78r4-3wfq-r2xm

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