CVE-2026-66786

CRITICAL 9.1

Submariner: submariner: ipsec.conf stanza injection via remote-supplied cablename and subnets

CVSS Score

9.1

EPSS Score

0.0%

EPSS Percentile

0th

A flaw was found in submariner. In cert-auth mode, the connection configuration is built using free-form strings from the Custom Resource Definition (CRD) without proper validation. A malicious cluster can exploit this by publishing a CableName that includes newlines and ipsec.conf directives. This allows an attacker to inject arbitrary configuration parameters or execute commands through leftupdown hooks, leading to remote code execution as root on the gateway node.

CWE	CWE-94
Vendor	red hat
Product	red hat advanced cluster management for kubernetes 2.17
Published	Sep 2, 2026
Last Updated	Sep 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High