CVE-2026-81303

A flaw was found in hawtio-operator. The operator holds routes/custom-host:create permission cluster-wide and writes the tenant-supplied spec.routeHostName value from the Hawtio custom resource directly into the Route spec without validation or authorization checks. A namespace edit user, who normally cannot set custom Route hostnames, can use the operator as a confused deputy to claim arbitrary externally-routable hostnames, enabling subdomain takeover and, in combination with the auto-grant OAuthClient, OAuth redirect hijack.

CVSS v3 6.3 MEDIUM

6.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.1 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-81303
https://bugzilla.redhat.com/show_bug.cgi?id=2524897

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-15 06:16

Updated : 2026-09-16 19:42

NVD link : CVE-2026-81303

Mitre link : CVE-2026-81303

CVE.ORG link : CVE-2026-81303

JSON object : View

Products Affected

No product.

CWE

CWE-441

Unintended Proxy or Intermediary ('Confused Deputy')

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