FKIE_CVE-2026-58649

Vulnerability from fkie_nvd - Published: 2026-09-08 18:17 - Updated: 2026-10-07 15:05
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Summary
Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.
References
secure@microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58649Patch, Vendor Advisory
Impacted products
Vendor Product Version
microsoft .net 11.0.0
microsoft .net 11.0.0
microsoft .net 11.0.0
microsoft .net 11.0.0
microsoft .net 11.0.0
microsoft .net 11.0.0
microsoft .net 11.0.0
microsoft .net_sdk *
microsoft .net_sdk *
microsoft .net_sdk *
microsoft .net_sdk *
microsoft .net_sdk *
microsoft .net_sdk *
apple macos -
linux linux_kernel -
microsoft windows -
microsoft visual_studio_2022 *
microsoft visual_studio_2026 *
To clipboard 

{
  "affected": [
    {
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          "vendor": "Microsoft",
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              "status": "affected",
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              "versionType": "custom"
            }
          ]
        },
        {
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          "vendor": "Microsoft",
          "versions": [
            {
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              "status": "affected",
              "version": "11.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET 8.0",
          "vendor": "Microsoft",
          "versions": [
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              "status": "affected",
              "version": "8.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
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          "vendor": "Microsoft",
          "versions": [
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              "status": "affected",
              "version": "9.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2022 version 17.14",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "17.14.40",
              "status": "affected",
              "version": "17.14.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2026 version 18.9",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "18.9.3",
              "status": "affected",
              "version": "18.9.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "configurations": [
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Origin validation error in .NET allows an unauthorized attacker to disclose information over a network."
    }
  ],
  "id": "CVE-2026-58649",
  "lastModified": "2026-10-07T15:05:42.297",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "secure@microsoft.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-58649",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-08T19:45:24.737506Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-08T18:17:44.380",
  "references": [
    {
      "source": "secure@microsoft.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58649"
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-346"
        }
      ],
      "source": "secure@microsoft.com",
      "type": "Secondary"
    }
  ]
}



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