Vulnerability-Lookup

GHSA-GF3R-GM67-JGRV

Vulnerability from github – Published: 2026-08-20 21:31 – Updated: 2026-08-20 21:31

Details

A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a tenant, who has the ability to create HelmRelease custom resources (CRs), to bypass existing security controls. The system's HelmRelease controller processes Helm chart templates using its own elevated ServiceAccount privileges without proper validation. This enables the tenant to deploy arbitrary resources across the entire cluster, leading to a significant security compromise.

Severity

9.9 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-67567"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-441"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-20T21:17:07Z",
    "severity": "CRITICAL"
  },
  "details": "A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a tenant, who has the ability to create HelmRelease custom resources (CRs), to bypass existing security controls. The system\u0027s HelmRelease controller processes Helm chart templates using its own elevated ServiceAccount privileges without proper validation. This enables the tenant to deploy arbitrary resources across the entire cluster, leading to a significant security compromise.",
  "id": "GHSA-gf3r-gm67-jgrv",
  "modified": "2026-08-20T21:31:29Z",
  "published": "2026-08-20T21:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67567"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-67567"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2514224"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-67567 (GCVE-0-2026-67567)

Vulnerability from cvelistv5 – Published: 2026-08-20 20:34 – Updated: 2026-08-20 20:34

Title

Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart applied with controller sa without gvk or namespace restriction

Summary

Severity

9.9 (Critical)


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

CWE

CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')

Assigner

redhat redhat root

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-67567	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2514224	issue-trackingx_refsource_REDHAT

Impacted products

1 product

Vendor	Product	Version
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2	cpe:/a:redhat:acm:2

Date Public

2026-08-11 00:00

Show details on NVD website

JSON

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  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:acm:2"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/multicluster-operators-subscription-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
          "vendor": "Red Hat"
        }
      ],
      "datePublic": "2026-08-11T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "metrics": [
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          "other": {
            "content": {
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              "value": "Important"
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            "type": "Red Hat severity rating"
          }
        },
        {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
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      "problemTypes": [
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              "lang": "en",
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            }
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        "dateUpdated": "2026-08-20T20:34:10.321Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
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      "references": [
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          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
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        },
        {
          "name": "RHBZ#2514224",
          "tags": [
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          "time": "2026-08-11T00:00:00.000Z",
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          "time": "2026-08-11T00:00:00.000Z",
          "value": "Made public."
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      ],
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      "workarounds": [
        {
          "lang": "en",
          "value": "To mitigate this issue, restrict the ability of untrusted tenants to create `HelmRelease` custom resources within the cluster. Implement strict Role-Based Access Control (RBAC) policies to limit which users or service accounts can create or modify `HelmRelease` objects. This will prevent unauthorized users from leveraging the controller\u0027s elevated privileges for cluster-wide resource deployment."
        }
      ],
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      },
      "x_redhatCweChain": "CWE-441: Unintended Proxy or Intermediary (\u0027Confused Deputy\u0027)"
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    "datePublished": "2026-08-20T20:34:10.321Z",
    "dateReserved": "2026-08-11T17:40:07.959Z",
    "dateUpdated": "2026-08-20T20:34:10.321Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

GHSA-GF3R-GM67-JGRV

CVE-2026-67567 (GCVE-0-2026-67567)

Tags

Sightings

Nomenclature