CVE-2026-66786
CRD injection in Submariner cert-auth permits root RCE on gateway nodes.
Is CVE-2026-66786 being exploited?
Not confirmed. CVE-2026-66786 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.74% probability of exploitation in the next 30 days.
How severe is CVE-2026-66786?
CVE-2026-66786 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-66786?
Yes. A fix has been recorded for CVE-2026-66786. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-66786 affect?
CVE-2026-66786 affects Submariner (cert-auth mode), Kubernetes clusters using Submariner, Gateway nodes running Submariner ipsec. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-66786?
Apply vendor patch immediately; restrict untrusted clusters and validate CRDs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Malicious CRD CableName can inject ipsec.conf directives and leftupdown hooks, enabling remote root code execution on gateway nodes.
Immediate action required