CVE-2026-65601
Description
A flaw was found in Traefik, a cloud-native edge router. A low-privileged user in a Kubernetes environment could exploit a namespace confusion vulnerability within the Kubernetes Gateway API provider. This flaw allows an attacker to bypass security controls by incorrectly binding a Traefik Middleware from a different namespace, potentially leading to the injection of trusted identity headers into network requests. This could result in unauthorized access or privilege escalation within the Kubernetes cluster.
Statement
This is an Important flaw in Traefik's Kubernetes Gateway API provider, affecting Red Hat OpenShift Dev Spaces. A low-privileged user in a Kubernetes environment can exploit a namespace confusion vulnerability to bypass security controls. This allows for the incorrect binding of a Traefik Middleware from a different namespace, potentially leading to the injection of trusted identity headers and subsequent privilege escalation within the cluster.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 9.6 | 8.8 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Changed | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | None | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism; Gain Privileges or Assume Identity
An attacker could utilize the untrusted data source to bypass protection mechanisms and gain access to sensitive data.
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