CVE-2026-62898

{
  "id": "CVE-2026-62898",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-11T17:18:43.993",
  "lastModified": "2026-10-28T21:17:07.447",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": ".NET 10.0 runtime",
          "versions": [
            {
              "version": "10.0.0",
              "lessThan": "10.0.11",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": ".NET 8.0 runtime",
          "versions": [
            {
              "version": "8.0.0",
              "lessThan": "8.0.30",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": ".NET 9.0 runtime",
          "versions": [
            {
              "version": "9.0.0",
              "lessThan": "9.0.19",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2022 version 17.14",
          "versions": [
            {
              "version": "17.14.0",
              "lessThan": "17.14.38",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2026 version 18.8",
          "versions": [
            {
              "version": "18.0",
              "lessThan": "18.8.3",
              "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: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": "2026-08-11T17:47:31.814853Z",
          "id": "CVE-2026-62898",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "17.14.0",
              "versionEndExcluding": "17.14.38",
              "matchCriteriaId": "CBE12A5C-0A6F-48FC-B80E-F3BD5137713B"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "18.8.0",
              "versionEndExcluding": "18.8.3",
              "matchCriteriaId": "276EE4F3-18B2-4458-B4E7-3A5C8C675034"
            }
          ]
        }
      ]
    },
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "8.0.0",
              "versionEndExcluding": "8.0.30",
              "matchCriteriaId": "D718FBC4-01E2-45E7-86B8-6E908C435EAA"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "9.0.0",
              "versionEndExcluding": "9.0.19",
              "matchCriteriaId": "FF0C1D09-877C-4EFB-A035-4C307503457C"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "10.0.0",
              "versionEndExcluding": "10.0.11",
              "matchCriteriaId": "A84629EB-2E2D-4667-A820-135DE130A767"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62898",
      "source": "[email protected]",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    }
  ]
}