CVE-2026-81723NLTK before 3.10.3 Quadratic CPU Exhaustion via XMLCorpusView

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• GitHub Security Advisory (GHSA-vp2x-qp44-57v7) vendor-advisory
• VulnCheck Advisory: NLTK before 3.10.3 Quadratic CPU Exhaustion via XMLCorpusView third-party-advisory