CVE-2026-81723
LOW
NVD
CVSS Score
3.7
Severity
LOW
Published
Aug 27, 2026
Vendor
unknown
Description
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.