{"id":"CVE-2018-15560","aliases":["GHSA-hgg3-g7gr-66r7","PYSEC-2018-21"],"url":"https://o3.security/vulnerability/CVE-2018-15560","summary":"PyCryptodome integer overflow vulnerability","details":"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.","published":"2018-08-20T00:29:00.697Z","modified":"2026-07-08T17:15:47.869719Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"PyPI","name":"pycryptodome","fixedVersion":"3.6.6"}],"fix":null,"references":[{"type":"EVIDENCE","url":"https://github.com/Legrandin/pycryptodome/issues/198"},{"type":"EVIDENCE","url":"https://whitehatck01.blogspot.com/2018/08/integer-overflow-vulnerability-in.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T17:15:47.869719Z"}}