Security advisory

{
  "id": "2b6e14608a1369ee32520a3c6b5ebaba431bc366fd3ff3ebba79f1f570133999",
  "url": "https://osv.dev/vulnerability/CVE-2018-15560",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-15560",
    "summary": "PyCryptodome before 3.6.6 has an integer overflow in the data_len variable in AESNI.c, related to the AESNI_encrypt and AESNI_decrypt functions, leading to the mishandling of messages shorter than 16 bytes.",
    "evidence": "osv:CVE-2018-15560",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-15560",
      "aliases": [
        "CVE-2018-15560",
        "GHSA-hgg3-g7gr-66r7",
        "PYSEC-2018-21"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/legrandin/pycryptodome",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9788edcd38f2104ae6def75caab90346eb3d4c69"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:pycryptodome:pycryptodome:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.6.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.6.6",
            "v3.6.5",
            "v3.6.4",
            "v3.6.3",
            "v3.6.2",
            "v3.6.1",
            "v3.6.0",
            "v3.5.1",
            "v3.4.12",
            "v3.4.11",
            "v3.4.10",
            "v3.4.9",
            "v3.4.8",
            "v3.4.6",
            "v3.4.5",
            "v3.4.4",
            "v3.4.3",
            "v3.3",
            "v3.4.2",
            "v3.4.1",
            "v3.4",
            "v3.3.1",
            "v3.2.1",
            "v3.2",
            "v3.1",
            "v3.0",
            "v3.0rc3",
            "v3.0rc2",
            "v3.0rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-15560.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:04.145344292Z",
      "provider": "osv",
      "references": [
        "https://github.com/Legrandin/pycryptodome/issues/198",
        "https://whitehatck01.blogspot.com/2018/08/integer-overflow-vulnerability-in.html"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-15560",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381226,
  "published_at": "2018-08-20T00:29:00.697+00:00"
}