CVE-2026-102870
Full vulnerability record from the local CVENow database.
Description
Improper control of generation of code ('code injection') in ASP.NET Core allows an unauthorized attacker to execute code over a network.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Undergoing Analysis
Source identifier
Published
2026-10-13 19:17:51.617000
Last modified
2026-10-25 18:16:42.253000
View original CVE JSON
{
"id": "CVE-2026-102870",
"sourceIdentifier": "[email protected]",
"published": "2026-10-13T19:17:51.617",
"lastModified": "2026-10-25T18:16:42.253",
"vulnStatus": "Undergoing Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Improper control of generation of code ('code injection') in ASP.NET Core allows an unauthorized attacker to execute code over a network."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Microsoft",
"product": ".NET 10.0 installed on Linux",
"versions": [
{
"version": "10.0.0",
"lessThan": "10.0.403",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 10.0 installed on Mac OS",
"versions": [
{
"version": "10.0.0",
"lessThan": "10.0.403",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 10.0 installed on Windows",
"versions": [
{
"version": "10.0.0",
"lessThan": "10.0.403",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 11.0 installed on Linux",
"versions": [
{
"version": "11.0.0-preview.1",
"lessThan": "11.0.100-rc.3",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 11.0 installed on Mac OS",
"versions": [
{
"version": "11.0.0-preview.1",
"lessThan": "11.0.100-rc.3",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 11.0 installed on Windows",
"versions": [
{
"version": "11.0.0-preview.1",
"lessThan": "11.0.100-rc.3",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2019 version 16.11",
"versions": [
{
"version": "16.11.0",
"lessThan": "16.11.61",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2022 version 17.14",
"versions": [
{
"version": "17.14.0",
"lessThan": "17.14.43",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2026 version 18.10",
"versions": [
{
"version": "18.10.0",
"lessThan": "18.10.4",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2026 version 18.11",
"versions": [
{
"version": "18.11.0",
"lessThan": "18.11.2",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2026 version 18.12",
"versions": [
{
"version": "18.12.0",
"lessThan": "18.12 Insiders 3",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft.AspNetCore.Components.WebAssembly.DevServer",
"versions": [
{
"version": "11.0.0-preview.1",
"lessThan": "10.0.14",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft.AspNetCore.Components.WebAssembly.Server",
"platforms": [
".NET 10.0 runtime installed on Linux",
".NET 10.0 runtime installed on Mac OS",
".NET 10.0 runtime installed on Windows",
".NET 11.0 runtime installed on Linux",
".NET 11.0 runtime installed on Mac OS",
".NET 11.0 runtime installed on Windows"
],
"versions": [
{
"version": "10.0.0",
"lessThan": "10.0.13",
"versionType": "custom",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-08T00:00:00+00:00",
"id": "CVE-2026-102870",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-94"
}
]
}
],
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102870",
"source": "[email protected]"
}
]
}