CVE-2026-81723
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.
- Affected products
- Nltk
- CVSS 4.0
- 6.3 MEDIUM
- CVSS 3.1
- 3.7 LOW
- Weakness
- CWE-400
- NVD status
- Received
- Published
- 2026-08-27
CVE-2026-81723 at NVD
No indexed exploits for CVE-2026-81723 yet
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No exploit for CVE-2026-81723 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.