{"apiVersion":"1.0","identifier":"CVE-2026-81723","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.","publishedAt":"2026-08-27T17:21:02","lastModifiedAt":"2026-08-27T17:21:02","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81723","cvssScore":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","epssProbability":0.00222,"riskScore":0.38,"affectedProduct":"NLTK","affectedVersions":"<3.10.3","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-81723","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-81723","en":"https://www.redsauce.net/en/cves/CVE-2026-81723","fr":"https://www.redsauce.net/fr/cves/CVE-2026-81723","pt":"https://www.redsauce.net/pt/cves/CVE-2026-81723","de":"https://www.redsauce.net/de/cves/CVE-2026-81723","sk":"https://www.redsauce.net/sk/cves/CVE-2026-81723","el":"https://www.redsauce.net/el/cves/CVE-2026-81723"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-81723"}}