{"id":"PYSEC-2026-501","summary":"pyminizip affected by zlib's integer overflow/heap based buffer overflow vulnerability due to vulnerable dependency","details":"MiniZip in zlib through 1.3 has an integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_64 via a long filename, comment, or extra field. NOTE: MiniZip is not a supported part of the zlib product.\n\npyminizip uses version 1.2.11 of zlib's code.","aliases":["CVE-2023-45853","GHSA-mq29-j5xf-cjwr"],"modified":"2026-07-01T20:23:02.988949Z","published":"2026-06-29T11:50:43.774027Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-45853"},{"type":"WEB","url":"https://github.com/madler/zlib/pull/843"},{"type":"WEB","url":"https://github.com/madler/zlib/commit/73331a6a0481067628f065ffe87bb1d8f787d10c"},{"type":"WEB","url":"https://chromium.googlesource.com/chromium/src/+/d709fb23806858847131027da95ef4c548813356"},{"type":"WEB","url":"https://chromium.googlesource.com/chromium/src/+/de29dd6c7151d3cd37cb4cf0036800ddfb1d8b61"},{"type":"WEB","url":"https://github.com/madler/zlib/blob/ac8f12c97d1afd9bafa9c710f827d40a407d3266/contrib/README.contrib#L1-L4"},{"type":"PACKAGE","url":"https://github.com/smihica/pyminizip"},{"type":"WEB","url":"https://github.com/smihica/pyminizip/blob/master/zlib-1.2.11/contrib/minizip/zip.c"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/11/msg00026.html"},{"type":"WEB","url":"https://pypi.org/project/pyminizip/#history"},{"type":"WEB","url":"https://security.gentoo.org/glsa/202401-18"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20231130-0009"},{"type":"WEB","url":"https://www.winimage.com/zLibDll/minizip.html"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/10/20/9"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/01/24/10"},{"type":"PACKAGE","url":"https://pypi.org/project/pyminizip"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-mq29-j5xf-cjwr"}],"affected":[{"package":{"name":"pyminizip","ecosystem":"PyPI","purl":"pkg:pypi/pyminizip"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.2.6"}]}],"versions":["0.0.1","0.0.2","0.1.0","0.1.1","0.2.0","0.2.1","0.2.2","0.2.3","0.2.4","0.2.5","0.2.6"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/pyminizip/PYSEC-2026-501.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}