{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.9.0"
              },
              {
                "fixed": "1.9.1"
              },
              {
                "introduced": "0"
              },
              {
                "fixed": "1.8.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "39b2f02978e497955a560c72b5ccdff5c0dbcda1"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "1f7a0811da5128db40fd7b868ae0aac0c581f91f"
            },
            {
              "fixed": "7c0920fe16adc497efae82881ac0f1e4d7ac98d0"
            },
            {
              "fixed": "1a229d0d14a07766302f7d14c866889f04a3a624"
            },
            {
              "fixed": "6d7431ebc0ebe6521ea6d0dbea8982bac3d2bc98"
            },
            {
              "fixed": "8f95f3ac3c929409e830b5c5659683ef9f6ea6b0"
            }
          ],
          "repo": "https://github.com/corewcf/corewcf",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-m744-jhq9-ppw6"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-248",
      "CWE-754",
      "CWE-755"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54775.json"
  },
  "details": "CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, a CoreWCF service listening on a Kafka topic stops processing new records from that topic when KafkaTransportPump receives a null-value tombstone record, causing a persistent endpoint denial of service for attackers with produce permission. This issue is fixed in versions 1.8.1 and 1.9.1.",
  "id": "CVE-2026-54775",
  "modified": "2026-07-11T03:54:27.635091472Z",
  "published": "2026-07-08T22:13:37.611Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54775.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-m744-jhq9-ppw6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54775"
    },
    {
      "type": "FIX",
      "url": "https://github.com/CoreWCF/CoreWCF/commit/1a229d0d14a07766302f7d14c866889f04a3a624"
    },
    {
      "type": "FIX",
      "url": "https://github.com/CoreWCF/CoreWCF/commit/6d7431ebc0ebe6521ea6d0dbea8982bac3d2bc98"
    },
    {
      "type": "FIX",
      "url": "https://github.com/CoreWCF/CoreWCF/commit/8f95f3ac3c929409e830b5c5659683ef9f6ea6b0"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "CoreWCF: Kafka consume pump halts permanently on a Kafka tombstone (null-value record), causing persistent endpoint denial of service."
}