CVE-2026-62383Medium· 5.5▾ Sunlitnltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely. Attackers can place a symlink in the corpus root directory and read arbitra…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 23.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
0.2% → 0.2%
nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely. Attackers can place a symlink in the corpus root directory and read arbitrary files accessible to the process by calling channels(), domains(), categories(), or fileids() methods with the symlink filename.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
nltk >= 3.10.0, < 3.10.2Patched in:
nltk 3.10.2Connected by shared product, vendor, weakness, or advisory.
CVE-2026-62384High· 7.5NLTK versions before 3.10.2 contain a symlink-based sandbox bypass in FramenetCorpusReader that allows attackers to read arbitrary XML files outside the corpus root
CVE-2026-79676HighNLTK: Corpus readers follow symlinks outside trusted roots despite pathsec enforcement
CVE-2026-70626Medium· 6.2NLTK versions before 3.9.4 contain a symlink escape vulnerability in CorpusReader.open() that allows local attackers to read arbitrary files outside the corpus root
CVE-2026-63312High· 7.5NLTK before 3.10.0 contains an arbitrary local file read vulnerability in StreamBackedCorpusView that bypasses pathsec.ENFORCE by calling builtins.open() directly instead of pathsec.open()
CVE-2026-62385Medium· 5.9NLTK versions before 3.10.0 contain a path traversal vulnerability in FramenetCorpusReader and NKJPCorpusReader that allows attackers to parse XML files outside the corpus root by supplying unsafe selectors or poisoned index state
CVE-2026-71514Low· 2.5NLTK 3.9.4 through 3.10.2 contains a path traversal vulnerability in CrubadanCorpusReader