CVE-2026-81303Network attack vector

Hostname takeover via unchecked custom Route creation

Published Sep 15, 2026 · Updated Sep 15, 2026

Authorization bypass in Red Hat build of Apache Camel - HawtIO 4 allows remote authenticated users to claim arbitrary Route hostnames. The hawtio-operator copies tenant-controlled spec.routeHostName values into OpenShift Route specifications under its cluster-wide routes/custom-host:create permission without validation or an authorization check. Namespace edit access is required; a claimed externally routable hostname enables subdomain takeover and can hijack OAuth redirects when the auto-grant OAuthClient is present.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Red Hat build of Apache Camel - HawtIO 4 allows remote authenticated users to claim arbitrary Route hostnames. The hawtio-operator copies tenant-controlled spec.routeHostName values into OpenShift Route specifications under its cluster-wide routes/custom-host:create permission without validation or an authorization check. Namespace edit access is required; a claimed externally routable hostname enables subdomain takeover and can hijack OAuth redirects when the auto-grant OAuthClient is present.

The record

CVE
CVE-2026-81303
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Red Hat
Product
Red Hat build of Apache Camel - HawtIO 4
Classifications
T1528
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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 versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Red Hat · Red Hat build of Apache Camel - HawtIO 4Affected versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1528Steal Application Access Token

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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