CVE-2026-66786
Critical
Description
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.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Acm 2.16
PublishedSep 2, 2026
First seenSep 2, 2026
Weakness typeCWE-94Code injection
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| acm 2.16 | No range specified | — |
| acm 2.17 | No range specified | — |
| Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 | No range specified | — |
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