CVE-2026-81723Low· 3.7▾ SunlitNLTK versions before 3.10.3 contain a quadratic CPU exhaustion vulnerability in XMLCorpusView._read_xml_fragment() that rescans accumulated XML fragments on every 1 KiB block read. Attackers can provide malformed XML corpus files to caus…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 20.4 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 2.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
low → medium
medium → low
low → medium
medium → low
low → medium
medium → low
low → medium
medium → low
low → medium
medium → low
low → medium
medium → low
Last analysed / modified upstream
0.2% → 0.4%
NLTK versions before 3.10.3 contain a quadratic CPU exhaustion vulnerability in XMLCorpusView._read_xml_fragment() that rescans accumulated XML fragments on every 1 KiB block read. Attackers can provide malformed XML corpus files to cause severe CPU consumption and denial of service through affected readers like BNCCorpusReader.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
nltk < 3.10.3Patched in:
nltk 3.10.3Source: https://osv.dev/vulnerability/GHSA-vp2x-qp44-57v7
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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