{"id":"GHSA-rqjh-jp2r-59cj","summary":"NLTK Vulnerable to REDoS","details":"NLTK is vulnerable to REDoS in some RegexpTaggers used in the functions `get_pos_tagger` and `malt_regex_tagger`.","aliases":["CVE-2021-3842","PYSEC-2022-5"],"modified":"2024-09-26T14:44:24.401483Z","published":"2022-01-06T22:24:14Z","database_specific":{"github_reviewed_at":"2022-01-06T19:53:00Z","nvd_published_at":"2022-01-04T15:15:00Z","cwe_ids":["CWE-1333"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3842"},{"type":"WEB","url":"https://github.com/nltk/nltk/pull/2906"},{"type":"WEB","url":"https://github.com/nltk/nltk/commit/2a50a3edc9d35f57ae42a921c621edc160877f4d"},{"type":"PACKAGE","url":"https://github.com/nltk/nltk"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2022-5.yaml"},{"type":"WEB","url":"https://huntr.dev/bounties/761a761e-2be2-430a-8d92-6f74ffe9866a"}],"affected":[{"package":{"name":"nltk","ecosystem":"PyPI","purl":"pkg:pypi/nltk"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.6"}]}],"versions":["0.8","0.9","0.9.3","0.9.4","0.9.5","0.9.6","0.9.7","0.9.8","0.9.9","2.0.1","2.0.1rc1","2.0.1rc2-git","2.0.1rc3","2.0.1rc4","2.0.2","2.0.3","2.0.4","2.0.5","2.0b4","2.0b5","2.0b6","2.0b7","2.0b8","2.0b9","3.0.0","3.0.0b1","3.0.0b2","3.0.1","3.0.2","3.0.3","3.0.4","3.0.5","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","3.4.2","3.4.3","3.4.4","3.4.5","3.5","3.5b1","3.6","3.6.1","3.6.2","3.6.3","3.6.4","3.6.5"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/01/GHSA-rqjh-jp2r-59cj/GHSA-rqjh-jp2r-59cj.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}