Security advisory

{
  "id": "b207c02ea6918dd0993f0b2ad9f30fa1d9d5db0e77c17f2f362a838873fead13",
  "url": "https://osv.dev/vulnerability/CVE-2026-62898",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-62898",
    "summary": "Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.",
    "evidence": "osv:CVE-2026-62898",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-62898",
      "aliases": [
        "BIT-dotnet-2026-62898",
        "BIT-dotnet-sdk-2026-62898",
        "CVE-2026-62898",
        "GHSA-c494-m2fq-59mx"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/dotnet/core",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d78b3180414d35d6c7d136db753474e2ae2b33df"
                },
                {
                  "fixed": "808c6af9a9cb4e3d6680f36180e55cb2aeb0ce26"
                },
                {
                  "introduced": "e18becd6171b8eb0eb4ec7ea8a0280cacfcee36b"
                },
                {
                  "fixed": "808c6af9a9cb4e3d6680f36180e55cb2aeb0ce26"
                },
                {
                  "introduced": "0e06b3b745aaf3f2f96e5f163773d20f8c7f7f50"
                },
                {
                  "fixed": "808c6af9a9cb4e3d6680f36180e55cb2aeb0ce26"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.0.0"
                      },
                      {
                        "fixed": "8.0.30"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "9.0.0"
                      },
                      {
                        "fixed": "9.0.19"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "10.0.0"
                      },
                      {
                        "fixed": "10.0.11"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v9.0.18",
            "v8.0.29",
            "v11.0.0-preview.6",
            "v10.0.10",
            "v9.0.17",
            "v11.0.0-preview.5",
            "v10.0.9",
            "v8.0.28",
            "v11.0.0-preview.4",
            "v9.0.16",
            "v8.0.27",
            "v10.0.8",
            "v10.0.7",
            "v11.0.0-preview.3",
            "v10.0.6",
            "v9.0.15",
            "v8.0.26",
            "v10.0.5",
            "v9.0.14",
            "v8.0.25",
            "v11.0.0-preview.2",
            "v10.0.4",
            "v11.0.0-preview.1",
            "v9.0.13",
            "v8.0.24",
            "v10.0.3",
            "v9.0.12",
            "v8.0.23",
            "v10.0.2",
            "v10.0.1",
            "v9.0.11",
            "v8.0.22",
            "v10.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62898.json"
          }
        }
      ],
      "modified": "2026-10-30T02:30:35.101303867Z",
      "provider": "osv",
      "references": [
        "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62898"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "microsoft:visual_studio_2022",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "17.14.0"
                  },
                  {
                    "fixed": "17.14.38"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "microsoft:visual_studio_2026",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "18.8.0"
                  },
                  {
                    "fixed": "18.8.3"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-62898",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432794,
  "published_at": "2026-08-11T17:18:43.993+00:00"
}