{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.2.5"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "aed3d81641ab52f2b29a154b9cbd4f07e685abc0"
            }
          ],
          "repo": "https://github.com/jm33-m0/emp3r0r",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-4595-rvpx-4q34"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61554.json"
  },
  "details": "emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 4.2.5, the `http_poll` C2 transport accepts attacker-controlled HTTP polling sessions before CBOR `MsgAuth` authentication is completed. A remote unauthenticated attacker can create arbitrary polling sessions and send request bodies that are forwarded into the C2 dispatch path. This can consume server resources and trigger pre-auth C2 processing. Version 4.2.5 patches the issue.",
  "id": "CVE-2026-61554",
  "modified": "2026-09-18T03:30:40.833564554Z",
  "published": "2026-09-15T20:48:05.156Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jm33-m0/emp3r0r/releases/tag/v4.2.5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61554.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-61554"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "emp3r0r has an unauthenticated HTTP Polling DoS"
}