Threats tagged 'brew-acronym-cve-2026-81724'

The NLTK library's FeatStructReader component suffers from uncontrolled recursion when parsing deeply nested feature-structure strings. This triggers an unhandled Python RecursionError, causing a denial of service by crashing the application. The issue arises because the parser lacks a maximum recursion depth guard, unlike other NLTK parsers. A crafted input with about 167 nested brackets (~669 bytes) can cause the crash quickly and without resource exhaustion. This vulnerability affects applications that parse user-supplied feature-structure or grammar text using FeatStructReader or FeatureGrammar.fromstring().