{"id":"CVE-2019-14751","details":"NLTK Downloader before 3.4.5 is vulnerable to a directory traversal, allowing attackers to write arbitrary files via a ../ (dot dot slash) in an NLTK package (ZIP archive) that is mishandled during extraction.","aliases":["GHSA-mr7p-25v2-35wr","PYSEC-2019-106"],"modified":"2026-04-16T00:07:04.369897548Z","published":"2019-08-22T16:15:10.213Z","related":["openSUSE-SU-2020:0436-1","openSUSE-SU-2020:0440-1","openSUSE-SU-2022:10040-1","openSUSE-SU-2024:11241-1","openSUSE-SU-2024:14103-1"],"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QI4IJGLZQ5S7C5LNRNROHAO2P526XE3D/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGZSSEJH7RHH3RBUEVWWYT75QU67J7SE/"},{"type":"ADVISORY","url":"https://github.com/nltk/nltk/blob/3.4.5/ChangeLog"},{"type":"FIX","url":"https://github.com/mssalvatore/CVE-2019-14751_PoC"},{"type":"FIX","url":"https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10"},{"type":"FIX","url":"https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nltk/nltk","events":[{"introduced":"0"},{"fixed":"acca8d573878e173379fe190d7f14f298b12dac9"},{"fixed":"f59d7ed8df2e0e957f7f247fe218032abdbe9a10"}],"database_specific":{"source":["CPE_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"3.4.5"}],"cpe":"cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*"}}],"versions":["2.0.1rc1","2.0.1rc2","2.0.1rc3","2.0.1rc4","3.0.0b1","3.0.2","3.0.3","3.0.4","3.0.5","3.0a4","3.1","3.2","3.2.1","3.2.2","3.2.3","3.2.4","3.2.5","3.3","3.4","3.4.1","3.4.3","3.4.4"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-14751.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}