{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.16.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4777d0b5c58cb02966a04a85832436bd66ed5d1f"
            },
            {
              "fixed": "800d57c9ca7352181167ec3c6aba66b8518c321c"
            }
          ],
          "repo": "https://github.com/alanxz/rabbitmq-c",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-jh48-qjf5-fx5v"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44236.json"
  },
  "details": "rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to 0.16.0, a malicious AMQP server can send an undersized connection.tune.frame_max value during amqp_login(), and rabbitmq-c accepts the value in amqp_login_inner() in librabbitmq/amqp_socket.c. amqp_tune_connection() in librabbitmq/amqp_connection.c uses frame_max to reallocate the outbound buffer without enforcing AMQP_FRAME_MIN_SIZE. Immediate serialization of connection.tune-ok through amqp_frame_to_bytes() writes beyond the undersized heap allocation, causing memory corruption and likely denial of service. An on-path attacker can also trigger the flaw against plaintext AMQP traffic. Code execution is theoretically possible but was not demonstrated. This issue is fixed in version 0.16.0.",
  "id": "CVE-2026-44236",
  "modified": "2026-09-19T03:30:43.604890807Z",
  "published": "2026-09-17T17:04:18.803Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/alanxz/rabbitmq-c/releases/tag/v0.16.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44236.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/alanxz/rabbitmq-c/security/advisories/GHSA-jh48-qjf5-fx5v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44236"
    },
    {
      "type": "FIX",
      "url": "https://github.com/alanxz/rabbitmq-c/commit/4777d0b5c58cb02966a04a85832436bd66ed5d1f"
    },
    {
      "type": "FIX",
      "url": "https://github.com/alanxz/rabbitmq-c/pull/879"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rabbitmq-c: Heap buffer overflow in AMQP login handshake via undersized connection.tune.frame_max"
}