CVE-2026-16242Network attack vector

Traffic compromise via unauthenticated agent enrollment

Published Jul 20, 2026 · Updated Aug 25, 2026

Authentication bypass in Konnectivity proxy-server configuration in Red Hat OpenShift Container Platform allows remote attackers to join the agent routing pool. The agent-facing listener was started without --cluster-ca-cert and without token-based agent authentication, so it accepts agent connections without validating presented client certificates against the hosted cluster's Konnectivity CA. Exposure requires network reachability to the agent-facing cluster endpoint; a successful connection lets the attacker proxy, inspect, modify, or drop control-plane-to-node traffic.

CVSS severity9.4
Critical
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Konnectivity proxy-server configuration in Red Hat OpenShift Container Platform allows remote attackers to join the agent routing pool. The agent-facing listener was started without --cluster-ca-cert and without token-based agent authentication, so it accepts agent connections without validating presented client certificates against the hosted cluster's Konnectivity CA. Exposure requires network reachability to the agent-facing cluster endpoint; a successful connection lets the attacker proxy, inspect, modify, or drop control-plane-to-node traffic.

The record

CVE
CVE-2026-16242
Published
Jul 20, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.4Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1557Adversary-in-the-Middle

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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