ASP.NET Core Tampering Vulnerability

{
  "id": "5d259eeb98d62be687411879cce64be8c5daf5a50366fe48a61cd24ff13801f4",
  "url": "https://osv.dev/vulnerability/BIT-aspnet-core-2026-88092",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ASP.NET Core Tampering Vulnerability",
    "summary": "Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.",
    "evidence": "osv:BIT-aspnet-core-2026-88092",
    "products": [
      {
        "name": {
          "value": "aspnet-core",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.0.32",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "9.0.21",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "10.0.13",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "BIT-aspnet-core-2026-88092",
      "aliases": [
        "BIT-aspnet-core-2026-88092",
        "CVE-2026-88092",
        "GHSA-rv87-ccxw-8ggf"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "8.0.0"
                },
                {
                  "fixed": "8.0.32"
                },
                {
                  "introduced": "9.0.0"
                },
                {
                  "fixed": "9.0.21"
                },
                {
                  "introduced": "10.0.0"
                },
                {
                  "fixed": "10.0.13"
                }
              ]
            }
          ],
          "package": {
            "name": "aspnet-core",
            "purl": "pkg:bitnami/aspnet-core",
            "ecosystem": "Bitnami"
          },
          "severity": [
            {
              "type": "CVSS_V3",
              "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L"
            }
          ],
          "database_specific": {
            "source": "https://github.com/bitnami/vulndb/tree/main/data/aspnet-core/BIT-aspnet-core-2026-88092.json"
          }
        }
      ],
      "modified": "2026-10-19T15:10:43.387550907Z",
      "provider": "osv",
      "references": [
        "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88092",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-88092"
      ],
      "provider_metadata": {
        "cpes": [
          "cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*"
        ],
        "severity": "Critical"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-88092",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 375270,
  "published_at": "2026-10-19T14:19:24.93+00:00"
}