Vulnerability-Lookup

CVE-2026-66797 (GCVE-0-2026-66797)

Vulnerability from cvelistv5 – Published: 2026-08-21 08:21 – Updated: 2026-08-21 19:45

Title

Apache CloudStack: Unauthorised comment creation and disclosure

Summary

Improper access control in CloudStack's annotation functionality allows unauthorized comment creation and disclosure. The addAnnotation and listAnnotation APIs perform an ownership check when an entity's UUID is specified, but fail to honor its result correctly. This lets any authenticated user write annotations to, and disclose existing annotations/comments on, an entity they don't own by simply supplying its UUID. This issue affects Apache CloudStack: from 4.15.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.

Severity

5.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 19:45 UTC

CWE

CWE-284 - Improper Access Control

Assigner

apache CNA under the mitre root

CNA scorecard B 76/100 over 1276 records in the last 180 days details

References

1 reference

URL	Tags
https://lists.apache.org/thread/g6cwddtjrwbh1d56w…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache CloudStack	Affected: 4.16.0.0 , ≤ 4.20.3.0 (semver) Affected: 4.21.0.0 , ≤ 4.22.1.0 (semver)	guessed

Credits

Łukasz Bawolski <lukasz.bawolski@exea.pl>

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-66797

Vulnerability from fkie_nvd - Published: 2026-08-21 09:16 - Updated: 2026-10-16 15:10

Severity

5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	security@apache.org	https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc	Mailing List, Vendor Advisory

Impacted products

	Vendor	Product	Version
	apache	cloudstack	*
	apache	cloudstack	*

JSON

To clipboard

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          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-66797",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-21T19:45:42.595886Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-21T09:16:40.577",
  "references": [
    {
      "source": "security@apache.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "security@apache.org",
      "type": "Secondary"
    }
  ]
}

GHSA-6777-P72P-347G

Vulnerability from github – Published: 2026-08-21 09:32 – Updated: 2026-08-21 21:31

Details

Improper access control in CloudStack's annotation functionality allows unauthorized comment creation and disclosure.

The addAnnotation and listAnnotation APIs perform an ownership check when an entity's UUID is specified, but fail to honor its result correctly. This lets any authenticated user write annotations to, and disclose existing annotations/comments on, an entity they don't own by simply supplying its UUID.

This issue affects Apache CloudStack: from 4.15.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.

Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.

Severity

5.4 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-66797"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-21T09:16:40Z",
    "severity": "MODERATE"
  },
  "details": "Improper access control in CloudStack\u0027s annotation functionality allows unauthorized\u00a0comment creation and disclosure.\n\n\n\n\nThe addAnnotation and listAnnotation APIs perform an ownership check when an entity\u0027s UUID is specified, but fail to honor its result correctly. This lets any authenticated user write annotations to, and disclose existing annotations/comments on, an entity they don\u0027t own by simply supplying its UUID.\n\n\n\n\nThis issue affects Apache CloudStack: from 4.15.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.\n\n\n\n\n\nUsers are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.",
  "id": "GHSA-6777-p72p-347g",
  "modified": "2026-08-21T21:31:48Z",
  "published": "2026-08-21T09:32:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66797"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

NCSC-2026-0332

Vulnerability from csaf_ncscnl - Published: 2026-08-27 07:44 - Updated: 2026-08-27 07:44

Summary

Kwetsbaarheden verholpen in Apache CloudStack

Scope

19 vulnerabilities in this advisory, including CVE-2026-66797.

CVE-2026-66797

Two vulnerabilities affect Red Hat Advanced Cluster Management for Kubernetes and Apache CloudStack, enabling privilege escalation via malicious RBAC injection and improper access control in annotation APIs, respectively.

8.5 (High)


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

Known affected: 1 product

Open the full advisory

RHSA-2026:60386

Vulnerability from csaf_redhat - Published: 2026-08-26 20:08 - Updated: 2026-11-13 16:44

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-2026-66797.

CVE-2026-66797

A flaw was found in the cluster-backup-operator. An attacker with write access to the backup storage location or the ability to create a Velero Backup object can inject malicious Role-Based Access Control (RBAC) resources into a backup. When this tampered backup is restored, the operator processes the malicious content, leading to a privilege escalation from backup-namespace-admin to hub cluster-admin. This allows the attacker to gain administrative control over the entire cluster.

8.5 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/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: 2026-11-13 16:44

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-2026-66797.

CVE-2026-66797

8.5 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/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: 2026-11-13 16:44

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-2026-66797.

CVE-2026-66797

8.5 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/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: 2026-11-13 14:59

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-2026-66797.

CVE-2026-66797

8.5 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/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: 2026-11-13 14:59

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-2026-66797.

CVE-2026-66797

8.5 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/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: 2026-11-13 14:59

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-2026-66797.

CVE-2026-66797

8.5 (High)


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

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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-2026-66797 (GCVE-0-2026-66797)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour