Vulnerability-Lookup

CVE-2026-66786 (GCVE-0-2026-66786)

Vulnerability from cvelistv5 – Published: 2026-09-02 17:57 – Updated: 2026-09-05 01:01

Title

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

Summary

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.

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-05 01:01 UTC

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

redhat redhat root

References

3 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:63016	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-66786	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507531	issue-trackingx_refsource_REDHAT

Impacted products

8 products

Vendor	Product	Version
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1788023916 , < * (rpm) cpe:/a:redhat:acm:2.17::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1788023940 , < * (rpm) cpe:/a:redhat:acm:2.17::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1788105072 , < * (rpm) cpe:/a:redhat:acm:2.17::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1788043964 , < * (rpm) cpe:/a:redhat:acm:2.17::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1788043961 , < * (rpm) cpe:/a:redhat:acm:2.17::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1788073481 , < * (rpm) cpe:/a:redhat:acm:2.17::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1788043970 , < * (rpm) cpe:/a:redhat:acm:2.17::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2	cpe:/a:redhat:acm:2

Date Public

2026-08-21 16:43

Show details on NVD website

JSON

To clipboard

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      "dataType": "CVE_RECORD",
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}

FKIE_CVE-2026-66786

Vulnerability from fkie_nvd - Published: 2026-09-02 18:21 - Updated: 2026-09-05 01:16

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:63016
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-66786
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2507531

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.17::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/lighthouse-agent-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1788023916",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.17::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/lighthouse-coredns-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1788023940",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.17::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/subctl-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1788105072",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.17::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/submariner-gateway-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1788043964",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.17::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/submariner-globalnet-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1788043961",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.17::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/submariner-rhel9-operator",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1788073481",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.17::el9"
          ],
          "defaultStatus": "affected",
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          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
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              "versionType": "rpm"
            }
          ]
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:acm:2"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/submariner-addon-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
          "vendor": "Red Hat"
        },
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:acm:2"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/submariner-operator-bundle",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-66786",
  "lastModified": "2026-09-05T01:16:49.053",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-66786",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-05T01:01:16.851937Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-02T18:21:10.517",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:63016"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-66786"
    },
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      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507531"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-F6R4-G4JR-H7F2

Vulnerability from github – Published: 2026-09-02 18:32 – Updated: 2026-09-03 15:32

Details

Severity

9.1 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-66786"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-02T18:21:10Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-f6r4-g4jr-h7f2",
  "modified": "2026-09-03T15:32:08Z",
  "published": "2026-09-02T18:32:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66786"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:63016"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-66786"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507531"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

RHSA-2026:63016

Vulnerability from csaf_redhat - Published: 2026-09-03 04:36 - Updated: 2026-09-14 12:20

Summary

Red Hat Security Advisory: Submariner v0.24 security fixes and container updates

Severity

Important

Scope

13 vulnerabilities in this advisory, including CVE-2026-66786.

CVE-2026-66786

9.1 (Critical)


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

Fixed: 28 products Known not affected: 5 products

https://access.redhat.com/errata/RHSA-2026:63016

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-66786 (GCVE-0-2026-66786)

FKIE_CVE-2026-66786

GHSA-F6R4-G4JR-H7F2

RHSA-2026:63016

Tags

Sightings

Nomenclature