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 mitre root

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

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-66797",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-21T19:45:42.595886Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-21T19:45:45.850Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache CloudStack",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "4.20.3.0",
              "status": "affected",
              "version": "4.16.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.22.1.0",
              "status": "affected",
              "version": "4.21.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "\u0141ukasz Bawolski \u003clukasz.bawolski@exea.pl\u003e"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003eImproper access control in CloudStack\u0027s annotation functionality allows unauthorized\u0026nbsp;comment creation and disclosure.\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eThe \u003ccode\u003eaddAnnotation\u003c/code\u003e and \u003ccode\u003elistAnnotation\u003c/code\u003e 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.\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eThis 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.\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eUsers are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.\u003c/div\u003e\u003cbr\u003e"
            }
          ],
          "value": "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."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "low"
            },
            "type": "Textual description of severity"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284 Improper Access Control",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-21T08:21:58.452Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Apache CloudStack: Unauthorised comment creation and disclosure",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-66797",
    "datePublished": "2026-08-21T08:21:58.452Z",
    "dateReserved": "2026-07-27T18:09:26.783Z",
    "dateUpdated": "2026-08-21T19:45:45.850Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-66797",
      "date": "2026-08-24",
      "epss": "0.00138",
      "percentile": "0.03377"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-66797\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2026-08-21T09:16:40.577\",\"lastModified\":\"2026-08-24T16:37:45.780\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"affected\":[{\"source\":\"security@apache.org\",\"affectedData\":[{\"vendor\":\"Apache Software Foundation\",\"product\":\"Apache CloudStack\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"4.16.0.0\",\"lessThanOrEqual\":\"4.20.3.0\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.21.0.0\",\"lessThanOrEqual\":\"4.22.1.0\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":5.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":2.5}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-08-21T19:45:42.595886Z\",\"id\":\"CVE-2026-66797\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@apache.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-284\"}]}],\"references\":[{\"url\":\"https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc\",\"source\":\"security@apache.org\"}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"affected\": [{\"defaultStatus\": \"unaffected\", \"product\": \"Apache CloudStack\", \"vendor\": \"Apache Software Foundation\", \"versions\": [{\"lessThanOrEqual\": \"4.20.3.0\", \"status\": \"affected\", \"version\": \"4.16.0.0\", \"versionType\": \"semver\"}, {\"lessThanOrEqual\": \"4.22.1.0\", \"status\": \"affected\", \"version\": \"4.21.0.0\", \"versionType\": \"semver\"}]}], \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"\\u0141ukasz Bawolski \u003clukasz.bawolski@exea.pl\u003e\"}], \"descriptions\": [{\"lang\": \"en\", \"supportingMedia\": [{\"base64\": false, \"type\": \"text/html\", \"value\": \"\u003cdiv\u003eImproper access control in CloudStack\u0027s annotation functionality allows unauthorized\u0026nbsp;comment creation and disclosure.\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eThe \u003ccode\u003eaddAnnotation\u003c/code\u003e and \u003ccode\u003elistAnnotation\u003c/code\u003e 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.\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eThis 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.\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eUsers are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.\u003c/div\u003e\u003cbr\u003e\"}], \"value\": \"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.\"}], \"metrics\": [{\"other\": {\"content\": {\"text\": \"low\"}, \"type\": \"Textual description of severity\"}}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-284\", \"description\": \"CWE-284 Improper Access Control\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"providerMetadata\": {\"orgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"shortName\": \"apache\", \"dateUpdated\": \"2026-08-21T08:21:58.452Z\"}, \"references\": [{\"tags\": [\"vendor-advisory\"], \"url\": \"https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc\"}], \"source\": {\"discovery\": \"UNKNOWN\"}, \"title\": \"Apache CloudStack: Unauthorised comment creation and disclosure\", \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.4, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"LOW\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-66797\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-21T19:45:42.595886Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-21T19:45:39.467Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-66797\", \"assignerOrgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"apache\", \"dateReserved\": \"2026-07-27T18:09:26.783Z\", \"datePublished\": \"2026-08-21T08:21:58.452Z\", \"dateUpdated\": \"2026-08-21T19:45:45.850Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-66797

Vulnerability from fkie_nvd - Published: 2026-08-21 09:16 - Updated: 2026-08-24 16:37

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

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache CloudStack",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "4.20.3.0",
              "status": "affected",
              "version": "4.16.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.22.1.0",
              "status": "affected",
              "version": "4.21.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-66797",
  "lastModified": "2026-08-24T16:37:45.780",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "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",
      "url": "https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Awaiting Analysis",
  "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"
    }
  ]
}

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

FKIE_CVE-2026-66797

GHSA-6777-P72P-347G

Tags

Sightings

Nomenclature