CVE-2026-62385Medium· 5.9▾ SunlitNLTK 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. Attac…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 32.5 · likelihood 0.1 · 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
0.4%
0.4% → 0.4%
Last analysed / modified upstream
NLTK 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. Attackers can exploit frame_by_name, doc, lu, and header methods with crafted parameters to read arbitrary XML files accessible to the application.
nltk < 3.10.0Upgrade past the affected range:
nltk 3.10.0Affected packages:
nltk <= 3.9.4Patched in:
nltk 3.10.0Source: https://github.com/advisories/GHSA-568f-pv23-39p4
Connected by shared product, vendor, weakness, or advisory.
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-2026-12261Medium· 6.5A vulnerability in `nltk.downloader` in nltk/nltk versions <= 3.9.4 allows for cross-package resource and model poisoning
GHSA-qp76-pq9f-gr9mHigh· 5.9Duplicate Advisory: Stable FrameNet and NKJP readers parse outside-root XML in 3.9.4
CVE-2026-78683Critical· 9.6NLTK before 3.10.0 (affected versions <=3.9.4) contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse() method (nltk/parse/transitionparser.py)
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-2026-65915Medium· 6.5NLTK versions before 3.10.0 contain a logic bug in FileSystemPathPointer.open() where the sandbox validation check compares a normalized path against itself, making the security check permanently inert