CVE-2026-81725: nltk, отказ на услуга

Описание

Оригинално описание

NLTK before 3.10.3 contains a regular expression denial of service vulnerability in Pl196xCorpusReader that allows attackers to cause quadratic CPU consumption by supplying malformed TEI blocks with many unmatched opening tags. Attackers can exploit lazy regex patterns in the read_block method through public APIs like words() and tagged_words() to force repeated rescans and achieve near-quadratic runtime growth.

Засегнати продукти

• nltk nltk: преди 3.10.3; 3.10.3

Вид слабост

• CWE-400 Неконтролирано потребление на ресурси

История

Други уязвимости в nltk nltk

• 8.3CVE-2026-109956
• 7.1CVE-2026-81727
• 8.3CVE-2026-81726
• 6.9CVE-2026-81724
• 6.3CVE-2026-81723

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-81725
• https://nvd.nist.gov/vuln/detail/CVE-2026-81725
• https://github.com/nltk/nltk/security/advisories/GHSA-8mpw-7fpc-4gqj
• https://www.vulncheck.com/advisories/nltk-before-3.10.3-regular-expression-denial-of-service-via-pl196xcorpusreader