CVE-2026-50222 (GCVE-0-2026-50222)

Vulnerability from cvelistv5 – Published: 2026-08-21 08:29 – Updated: 2026-08-25 19:34
VLAI
Title
Apache CloudStack: Improper access control in Userdata reference APIs
Summary
Missing Authorization, Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack's Userdata reference APIs. Several userdata-related APIs in Apache CloudStack, including deleteUserData, linkUserDataToTemplate, resetUserDataForVirtualMachine, deployVirtualMachine, and updateVirtualMachine, exhibit missing or insufficient access control validation, potentially allowing cross-tenant/cross-account access to userdata resources that belong to other tenants. This issue affects Apache CloudStack: from 4.18.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. The deleteCniConfiguration API, introduced in 4.21.0.0, also exhibits similar behaviour and lacks access validation. Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 19:33 UTC
CWE
  • CWE-862 - Missing Authorization
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache CloudStack Affected: 4.18.0.0 , ≤ 4.20.3.0 (semver)
Affected: 4.21.0.0 , ≤ 4.22.1.0 (semver)
guessed Create a notification for this product.
Credits
Bernardo De Marco Gonçalves <bernardomg2004@gmail.com> Yuliang Xiao <xyl1509410143@outlook.com> Łukasz Bawolski <Lukasz.Bawolski@exea.pl> George Chen (GitHub: geo-chen) KQ Wu <kqmailbox@163.com>
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-50222",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-25T19:33:56.794540Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-25T19:34:16.076Z",
          "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": "4.18.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.22.1.0",
              "status": "affected",
              "version": "4.21.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Bernardo De Marco Gon\u00e7alves \u003cbernardomg2004@gmail.com\u003e"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Yuliang Xiao \u003cxyl1509410143@outlook.com\u003e"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "\u0141ukasz Bawolski \u003cLukasz.Bawolski@exea.pl\u003e"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "George Chen (GitHub: geo-chen)"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "KQ Wu \u003ckqmailbox@163.com\u003e"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eMissing Authorization, Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack\u0027s Userdata reference APIs.\u003c/p\u003e\u003cp\u003eSeveral userdata-related APIs in Apache CloudStack, including \u003ccode\u003edeleteUserData\u003c/code\u003e, \u003ccode\u003elinkUserDataToTemplate\u003c/code\u003e, \u003ccode\u003eresetUserDataForVirtualMachine\u003c/code\u003e, \u003ccode\u003edeployVirtualMachine\u003c/code\u003e, and \u003ccode\u003eupdateVirtualMachine\u003c/code\u003e, exhibit missing or insufficient access control validation, potentially allowing cross-tenant/cross-account access to userdata resources that belong to other tenants.\u003c/p\u003e\u003cp\u003eThis issue affects Apache CloudStack: from 4.18.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.\u003c/p\u003e\u003cp\u003eThe deleteCniConfiguration API, introduced in 4.21.0.0, also exhibits similar behaviour and lacks access validation.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.\u003c/p\u003e"
            }
          ],
          "value": "Missing Authorization, Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack\u0027s Userdata reference APIs.\n\nSeveral userdata-related APIs in Apache CloudStack, including deleteUserData, linkUserDataToTemplate, resetUserDataForVirtualMachine, deployVirtualMachine, and updateVirtualMachine, exhibit missing or insufficient access control validation, potentially allowing cross-tenant/cross-account access to userdata resources that belong to other tenants.\n\nThis issue affects Apache CloudStack: from 4.18.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.\n\nThe deleteCniConfiguration API, introduced in 4.21.0.0, also exhibits similar behaviour and lacks access validation.\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": "important"
            },
            "type": "Textual description of severity"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-21T08:29:17.886Z",
        "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: Improper access control in Userdata reference APIs",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-50222",
    "datePublished": "2026-08-21T08:29:17.886Z",
    "dateReserved": "2026-06-04T06:31:36.779Z",
    "dateUpdated": "2026-08-25T19:34:16.076Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-50222",
      "date": "2026-08-27",
      "epss": "0.00309",
      "percentile": "0.23047"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-50222\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2026-08-21T09:16:38.280\",\"lastModified\":\"2026-08-27T00:37:58.200\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Missing Authorization, Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack\u0027s Userdata reference APIs.\\n\\nSeveral userdata-related APIs in Apache CloudStack, including deleteUserData, linkUserDataToTemplate, resetUserDataForVirtualMachine, deployVirtualMachine, and updateVirtualMachine, exhibit missing or insufficient access control validation, potentially allowing cross-tenant/cross-account access to userdata resources that belong to other tenants.\\n\\nThis issue affects Apache CloudStack: from 4.18.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.\\n\\nThe deleteCniConfiguration API, introduced in 4.21.0.0, also exhibits similar behaviour and lacks access validation.\\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\":\"4.18.0.0\",\"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:N/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-08-25T19:33:56.794540Z\",\"id\":\"CVE-2026-50222\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@apache.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-200\"},{\"lang\":\"en\",\"value\":\"CWE-862\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.18.0.0\",\"versionEndExcluding\":\"4.20.3.1\",\"matchCriteriaId\":\"2984C5AE-1154-456A-BFF5-067503BBF7D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.21.0.0\",\"versionEndExcluding\":\"4.22.1.1\",\"matchCriteriaId\":\"D603F400-5DA6-4A5C-BE58-91F137F8983C\"}]}]}],\"references\":[{\"url\":\"https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc\",\"source\":\"security@apache.org\",\"tags\":[\"Vendor Advisory\",\"Mailing List\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-50222\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-25T19:33:56.794540Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-25T19:34:12.407Z\"}}], \"cna\": {\"title\": \"Apache CloudStack: Improper access control in Userdata reference APIs\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Bernardo De Marco Gon\\u00e7alves \u003cbernardomg2004@gmail.com\u003e\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Yuliang Xiao \u003cxyl1509410143@outlook.com\u003e\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"\\u0141ukasz Bawolski \u003cLukasz.Bawolski@exea.pl\u003e\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"George Chen (GitHub: geo-chen)\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"KQ Wu \u003ckqmailbox@163.com\u003e\"}], \"metrics\": [{\"other\": {\"type\": \"Textual description of severity\", \"content\": {\"text\": \"important\"}}}], \"affected\": [{\"vendor\": \"Apache Software Foundation\", \"product\": \"Apache CloudStack\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.18.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.20.3.0\"}, {\"status\": \"affected\", \"version\": \"4.21.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.22.1.0\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Missing Authorization, Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack\u0027s Userdata reference APIs.\\n\\nSeveral userdata-related APIs in Apache CloudStack, including deleteUserData, linkUserDataToTemplate, resetUserDataForVirtualMachine, deployVirtualMachine, and updateVirtualMachine, exhibit missing or insufficient access control validation, potentially allowing cross-tenant/cross-account access to userdata resources that belong to other tenants.\\n\\nThis issue affects Apache CloudStack: from 4.18.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.\\n\\nThe deleteCniConfiguration API, introduced in 4.21.0.0, also exhibits similar behaviour and lacks access validation.\\n\\nUsers are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eMissing Authorization, Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack\u0027s Userdata reference APIs.\u003c/p\u003e\u003cp\u003eSeveral userdata-related APIs in Apache CloudStack, including \u003ccode\u003edeleteUserData\u003c/code\u003e, \u003ccode\u003elinkUserDataToTemplate\u003c/code\u003e, \u003ccode\u003eresetUserDataForVirtualMachine\u003c/code\u003e, \u003ccode\u003edeployVirtualMachine\u003c/code\u003e, and \u003ccode\u003eupdateVirtualMachine\u003c/code\u003e, exhibit missing or insufficient access control validation, potentially allowing cross-tenant/cross-account access to userdata resources that belong to other tenants.\u003c/p\u003e\u003cp\u003eThis issue affects Apache CloudStack: from 4.18.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.\u003c/p\u003e\u003cp\u003eThe deleteCniConfiguration API, introduced in 4.21.0.0, also exhibits similar behaviour and lacks access validation.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-862\", \"description\": \"CWE-862 Missing Authorization\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-200\", \"description\": \"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor\"}]}], \"providerMetadata\": {\"orgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"shortName\": \"apache\", \"dateUpdated\": \"2026-08-21T08:29:17.886Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-50222\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-25T19:34:16.076Z\", \"dateReserved\": \"2026-06-04T06:31:36.779Z\", \"assignerOrgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"datePublished\": \"2026-08-21T08:29:17.886Z\", \"assignerShortName\": \"apache\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.