Vulnerability-Lookup

CVE-2026-66793 (GCVE-0-2026-66793)

Vulnerability from cvelistv5 – Published: 2026-08-18 15:02 – Updated: 2026-09-05 14:23

Title

Governance-policy-addon-controller: governance-policy-addon-controller: arbitrary container image override via managedclusteraddon annotation enables rce on spoke

Summary

A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Cluster Management for Kubernetes. A user with permissions to annotate the namespaced ManagedClusterAddOn resource can override the governance-policy container image. This allows an attacker to run a controlled image with cluster-admin privileges on the managed cluster, leading to arbitrary code execution and privilege escalation.

Severity

8.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 17:59 UTC

CWE

CWE-20 - Improper Input Validation

Assigner

redhat redhat root

References

8 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:60386	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60387	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60388	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60389	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60390	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60391	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-66793	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507538	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.11	Unaffected: 1787683327 , < * (rpm) cpe:/a:redhat:acm:2.11::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.13	Unaffected: 1787259078 , < * (rpm) cpe:/a:redhat:acm:2.13::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.14	Unaffected: 1787080755 , < * (rpm) cpe:/a:redhat:acm:2.14::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.15	Unaffected: 1787238535 , < * (rpm) cpe:/a:redhat:acm:2.15::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.16	Unaffected: 1787080753 , < * (rpm) cpe:/a:redhat:acm:2.16::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1787227696 , < * (rpm) cpe:/a:redhat:acm:2.17::el9

Date Public

2026-08-18 14:25

Show details on NVD website

JSON

To clipboard

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\"https://access.redhat.com/errata/RHSA-2026:60390\", \"name\": \"RHSA-2026:60390\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:60391\", \"name\": \"RHSA-2026:60391\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2026-66793\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2507538\", \"name\": \"RHBZ#2507538\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"To mitigate this issue, restrict users\u0027 ability to annotate ManagedClusterAddOn resources within the hub cluster. Ensure that only trusted administrators have namespace-level annotate permissions on these resources. Regularly review and audit permissions related to ManagedClusterAddOn resources to prevent unauthorized modifications. If a service is restarted or reloaded, these permission changes will persist.\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Cluster Management for Kubernetes. A user with permissions to annotate the namespaced ManagedClusterAddOn resource can override the governance-policy container image. This allows an attacker to run a controlled image with cluster-admin privileges on the managed cluster, leading to arbitrary code execution and privilege escalation.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-20\", \"description\": \"Improper Input Validation\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-09-05T14:23:37.148Z\"}, \"x_redhatCweChain\": \"CWE-20: Improper Input Validation\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-66793\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-05T14:23:37.148Z\", \"dateReserved\": \"2026-07-27T17:51:24.886Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-08-18T15:02:31.273Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-66793

Vulnerability from fkie_nvd - Published: 2026-08-18 15:17 - Updated: 2026-08-27 04:16

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60386
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60387
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60388
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60389
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60390
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60391
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-66793
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2507538

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.11::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.11",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1787683327",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.13::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.13",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1787259078",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.14::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.14",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1787080755",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.15::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.15",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1787238535",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.16::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1787080753",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:acm:2.17::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/acm-governance-policy-addon-controller-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1787227696",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Cluster Management for Kubernetes. A user with permissions to annotate the namespaced ManagedClusterAddOn resource can override the governance-policy container image. This allows an attacker to run a controlled image with cluster-admin privileges on the managed cluster, leading to arbitrary code execution and privilege escalation."
    }
  ],
  "id": "CVE-2026-66793",
  "lastModified": "2026-08-27T04:16:46.047",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-66793",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-18T17:59:33.712099Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-18T15:17:00.140",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60386"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60387"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60388"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60389"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60390"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60391"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-66793"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507538"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-XH6J-XCJJ-J38G

Vulnerability from github – Published: 2026-08-18 15:31 – Updated: 2026-08-27 06:31

Details

Severity

8.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-66793"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-18T15:17:00Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Cluster Management for Kubernetes. A user with permissions to annotate the namespaced ManagedClusterAddOn resource can override the governance-policy container image. This allows an attacker to run a controlled image with cluster-admin privileges on the managed cluster, leading to arbitrary code execution and privilege escalation.",
  "id": "GHSA-xh6j-xcjj-j38g",
  "modified": "2026-08-27T06:31:23Z",
  "published": "2026-08-18T15:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66793"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60386"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60387"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60388"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60389"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60390"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60391"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-66793"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507538"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

RHSA-2026:60386

Vulnerability from csaf_redhat - Published: 2026-08-26 20:08 - Updated: 2026-09-17 00:18

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.17.1 security update

Severity

Important

Scope

62 vulnerabilities in this advisory, including CVE-2026-66793.

CVE-2026-66793

8.8 (High)


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

Fixed: 4 products Known not affected: 180 products

https://access.redhat.com/errata/RHSA-2026:60386

Open the full advisory

RHSA-2026:60387

Vulnerability from csaf_redhat - Published: 2026-08-26 20:10 - Updated: 2026-09-17 00:18

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.11.11 security update

Severity

Important

Scope

55 vulnerabilities in this advisory, including CVE-2026-66793.

CVE-2026-66793

8.8 (High)


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

Fixed: 4 products Known not affected: 160 products

https://access.redhat.com/errata/RHSA-2026:60387

Open the full advisory

RHSA-2026:60388

Vulnerability from csaf_redhat - Published: 2026-08-26 20:11 - Updated: 2026-09-17 00:18

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.14.4 security update

Severity

Important

Scope

60 vulnerabilities in this advisory, including CVE-2026-66793.

CVE-2026-66793

8.8 (High)


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

Fixed: 4 products Known not affected: 172 products

https://access.redhat.com/errata/RHSA-2026:60388

Open the full advisory

RHSA-2026:60389

Vulnerability from csaf_redhat - Published: 2026-08-26 20:11 - Updated: 2026-09-16 23:44

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.15.6 security update

Severity

Important

Scope

40 vulnerabilities in this advisory, including CVE-2026-66793.

CVE-2026-66793

8.8 (High)


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

Fixed: 4 products Known not affected: 180 products

https://access.redhat.com/errata/RHSA-2026:60389

Open the full advisory

RHSA-2026:60390

Vulnerability from csaf_redhat - Published: 2026-08-26 20:11 - Updated: 2026-09-16 23:44

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.13.11 security update

Severity

Important

Scope

56 vulnerabilities in this advisory, including CVE-2026-66793.

CVE-2026-66793

8.8 (High)


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

Fixed: 4 products Known not affected: 172 products

https://access.redhat.com/errata/RHSA-2026:60390

Open the full advisory

RHSA-2026:60391

Vulnerability from csaf_redhat - Published: 2026-08-26 20:11 - Updated: 2026-09-16 23:44

Summary

Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.16.4 security update

Severity

Important

Scope

41 vulnerabilities in this advisory, including CVE-2026-66793.

CVE-2026-66793

8.8 (High)


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

Fixed: 4 products Known not affected: 184 products

https://access.redhat.com/errata/RHSA-2026:60391

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-66793 (GCVE-0-2026-66793)

Tags

Sightings

Nomenclature

Related by attack behaviour