CVE-2026-50222 (GCVE-0-2026-50222)
Vulnerability from cvelistv5 – Published: 2026-08-21 08:29 – Updated: 2026-08-21 08:29
VLAI
EPSS
VEX
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
No CVSS data available.
CWE
Assigner
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:
4.18.0.0 , ≤ 4.20.3.0
(semver)
Affected: 4.21.0.0 , ≤ 4.22.1.0 (semver) |
guessed |
{
"containers": {
"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": "2026-08-21T08:29:17.886Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-50222",
"date": "2026-08-24",
"epss": "0.00132",
"percentile": "0.02995"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-50222\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2026-08-21T09:16:38.280\",\"lastModified\":\"2026-08-24T16:37:45.780\",\"vulnStatus\":\"Awaiting Analysis\",\"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\":{},\"weaknesses\":[{\"source\":\"security@apache.org\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-200\"},{\"lang\":\"en\",\"value\":\"CWE-862\"}]}],\"references\":[{\"url\":\"https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc\",\"source\":\"security@apache.org\"}]}}"
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Loading…
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.
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.
Loading…
Loading…