Critical

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

Type: advisorySource: Official CVE List1 source record

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.

Announced 2 Sept 2026Source revision 1

Original source ↗

CVE-2026-66786

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-66786

Red Hat Advanced Cluster Management for Kubernetes 2.16

Source reference: /containers/cna/affected/0/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.16

Source reference: /containers/cna/affected/1/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.16

Source reference: /containers/cna/affected/2/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.16

Source reference: /containers/cna/affected/3/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.16

Source reference: /containers/cna/affected/4/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.16

Source reference: /containers/cna/affected/5/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.16

Source reference: /containers/cna/affected/6/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.17

Source reference: /containers/cna/affected/7/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.17

Source reference: /containers/cna/affected/8/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.17

Source reference: /containers/cna/affected/9/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.17

Source reference: /containers/cna/affected/10/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.17

Source reference: /containers/cna/affected/11/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.17

Source reference: /containers/cna/affected/12/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2.17

Source reference: /containers/cna/affected/13/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2

Source reference: /containers/cna/affected/14/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Advanced Cluster Management for Kubernetes 2

Source reference: /containers/cna/affected/15/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

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    "vendor": "Red Hat",
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        "version": "1788043961",
        "lessThan": "*",
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        "lessThan": "*",
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    ],
    "vendor": "Red Hat",
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    "versions": [
      {
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        "version": "1788043970",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "rhacm2/submariner-route-agent-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
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    ],
    "vendor": "Red Hat",
    "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
    "packageName": "rhacm2/submariner-addon-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:acm:2"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
    "packageName": "rhacm2/submariner-operator-bundle",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  }
]

Related CVEs: CVE-2026-66786
Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event: #39078 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 10:40:26 GMT
Publisher date: Wed, 02 Sep 2026 17:57:19 GMT

Read the original announcement