CVE-2026-81724 - NLTK before 3.10.3 contains an uncontrolled recursion vulnerability in nltk.featstruct.FeatStructReader that allows unauthenticated attackers to cause a denial of service by supplying deeply nested feature-structure input. Attackers can craft trivial payloads with nested brackets that exceed Python's recursion limit and raise an unhandled RecursionError, crashing applications that parse user-supplied feature structures or feature grammars. - 漏洞详情

漏洞编号：CVE-2026-81724

风险等级：中危

漏洞来源：CVE

CVE 编号：CVE-2026-81724

CNNVD 编号：-

厂商/产品：- / -

影响范围：-

CWE：CWE-674

发布/更新时间：2026-08-27 / 2026-08-28

漏洞描述

NLTK before 3.10.3 contains an uncontrolled recursion vulnerability in nltk.featstruct.FeatStructReader that allows unauthenticated attackers to cause a denial of service by supplying deeply nested feature-structure input. Attackers can craft trivial payloads with nested brackets that exceed Python's recursion limit and raise an unhandled RecursionError, crashing applications that parse user-supplied feature structures or feature grammars.

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