CVE-2026-78427Network attack vectorHinoki check available

Admission deny bypass via sidecar image impersonation

Published Sep 17, 2026 · Updated Sep 28, 2026

Admission control bypass in SUSE NeuVector 5.6.1 allows remote authenticated users to deploy denied containers through crafted image paths. The admission webhook omits policy evaluation when a workload-supplied image path matches one of three hardcoded service mesh sidecar images. Exploitation requires permission to deploy workloads and enabled admission deny rules; matching containers enter despite those rules.

CVSS severity4.3
Medium
EPSS probability0.24%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Admission control bypass in SUSE NeuVector 5.6.1 allows remote authenticated users to deploy denied containers through crafted image paths. The admission webhook omits policy evaluation when a workload-supplied image path matches one of three hardcoded service mesh sidecar images. Exploitation requires permission to deploy workloads and enabled admission deny rules; matching containers enter despite those rules.

The record

CVE
CVE-2026-78427
Published
Sep 17, 2026
Updated
Sep 28, 2026
Vendor
SUSE
Product
NeuVector
Classifications
CWE-807, T1610
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=v5.6.1 changes=[{"at":"5.6.2","status":"unaffected"},{"at":"5.5.4","status":"unaffected"},{"at":"5.4.11","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SUSE · NeuVectorversion=0 <=v5.6.1 changes=[{"at":"5.6.2","status":"unaffected"},{"at":"5.5.4","status":"unaffected"},{"at":"5.4.11","status":"unaffected"}]

Published CVSS scores

4.3SUSE CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-807Reliance on Untrusted Inputs in a Security Decision
T1610Deploy Container

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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