{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "2.8.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e2e35c07bce2f40e7513e1b29a6d300d5329dbc3"
            }
          ],
          "repo": "https://github.com/secdev/scapy",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-xx44-g48m-mjp6"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/128xxx/CVE-2026-128237.json"
  },
  "details": "Scapy before 2.8.0 contains a denial of service vulnerability in BER_num_dec() and BERcodec_OID.do_dec() that allows remote attackers to exhaust CPU by supplying oversized OID arcs. Attackers can send ASN.1/BER data with many base-128 continuation bytes to cause quadratic CPU consumption or an uncaught ValueError crash on Python 3.11+.",
  "id": "CVE-2026-128237",
  "modified": "2026-11-14T02:30:40.978599642Z",
  "published": "2026-11-13T09:33:49.101Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/128xxx/CVE-2026-128237.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/secdev/scapy/security/advisories/GHSA-xx44-g48m-mjp6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-128237"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/scapy-before-2.8.0-denial-of-service-via-quadratic-ber-oid-decoding"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Scapy before 2.8.0 Denial of Service via Quadratic BER OID Decoding"
}