CVE-2026-14450: Maas-billing: maas api: privilege escalation via forged http headers due to missing authentication

Severity: critical (CVSS 9.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-10 · updated 2026-08-27
Weakness: CWE-290

Description

A flaw was found in the MaaS API. This vulnerability allows any pod within the cluster to bypass the Kuadrant AuthPolicy gateway by forging HTTP headers, specifically `X-MaaS-Username` and `X-MaaS-Group`, which are trusted verbatim. This lack of first-party authentication enables an attacker to gain unauthorized access and escalate privileges. The concrete consequences include the ability to mint Kubernetes ServiceAccount tokens in other tenants' namespaces, revoke API keys, and exfiltrate sensitive model access configuration.

Affected products

Red Hat OpenShift AI 3.4: all versions — fixed in 1785850409, 1787153683

How to fix

Upgrade to a fixed version: Red Hat OpenShift AI 3.4 1785850409, 1787153683. Check the vendor advisory for mitigations.

References

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