Security advisory

{
  "id": "012d609aedbffa2649a13ce6ed6d30c33530583ed2b0ba57828320ab094744fa",
  "url": "https://osv.dev/vulnerability/CVE-2023-35391",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2023-35391",
    "summary": "ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability",
    "evidence": "osv:CVE-2023-35391",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-35391",
      "aliases": [
        "BIT-aspnet-core-2023-35391",
        "BIT-dotnet-2023-35391",
        "BIT-dotnet-sdk-2023-35391",
        "CVE-2023-35391",
        "GHSA-j8rm-cm55-qqj6"
      ],
      "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": "ee849590a02cc5cd61eff18aa64bf985ec45124d"
                },
                {
                  "fixed": "28577332a7c3ed4134105a80b949da96dd4b9e1f"
                },
                {
                  "introduced": "63772e2191a750dd3cafa75914cacdb038c7520c"
                },
                {
                  "fixed": "28577332a7c3ed4134105a80b949da96dd4b9e1f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.0.0"
                      },
                      {
                        "fixed": "6.0.21"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.0.0"
                      },
                      {
                        "fixed": "7.0.10"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v8.0.0-preview.6",
            "v7.0.9",
            "v6.0.20",
            "v7.0.8",
            "v6.0.19",
            "v8.0.0-preview.5",
            "v7.0.7",
            "v6.0.18",
            "v8.0.0-preview.4",
            "v8.0.0-preview.3",
            "v7.0.5",
            "v6.0.16",
            "v8.0.0-preview.2",
            "v7.0.4",
            "v6.0.15",
            "v8.0.0-preview.1",
            "v7.0.3",
            "v6.0.14",
            "v7.0.2",
            "v6.0.13",
            "v7.0.1",
            "v6.0.12",
            "v3.1.32",
            "v7.0.0",
            "v6.0.11",
            "v3.1.31"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-35391.json"
          }
        }
      ],
      "modified": "2026-10-24T10:31:06.476752840Z",
      "provider": "osv",
      "references": [
        "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35391"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "microsoft:asp.net_core",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.1"
                  },
                  {
                    "fixed": "2.1.40"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "microsoft:visual_studio_2022",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "17.2.0"
                  },
                  {
                    "fixed": "17.2.18"
                  },
                  {
                    "introduced": "17.4.0"
                  },
                  {
                    "fixed": "17.4.10"
                  },
                  {
                    "introduced": "17.6.0"
                  },
                  {
                    "fixed": "17.6.6"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-35391",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 440991,
  "published_at": "2023-08-08T19:15:09.94+00:00"
}