{"schemaVersion":3,"id":"CVE-2026-33236","aliases":["GHSA-469j-vmhf-r6v7","PYSEC-2026-2237","UBUNTU-CVE-2026-33236","DEBIAN-CVE-2026-33236","CGA-2cww-5gmf-cr88","CGA-3336-677x-fchp","CGA-4jr3-xfr8-9fcw","CGA-4v7c-5m2c-88mx","CGA-h2fh-5gp3-8gxf","CGA-j525-fv53-hqww","CGA-m82p-37ph-fv39","CGA-pfp8-9rfw-3ppg"],"status":"published","duplicateOf":null,"title":null,"description":"NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. In versions 3.9.3 and prior, the NLTK downloader does not validate the `subdir` and `id` attributes when processing remote XML index files. Attackers can control a remote XML index server to provide malicious values containing path traversal sequences (such as `../`), which can lead to arbitrary directory creation, arbitrary file creation, and arbitrary file overwrite. 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