CVE-2026-66393

弱点类型

NLTK versions before 3.9.4 contain an unbounded recursion vulnerability in JSONTaggedDecoder.decode_obj() that allows attackers to cause denial of service by supplying deeply nested JSON structures. Attackers can craft JSON payloads exceeding the recursion limit to trigger an unhandled RecursionError that crashes the Python process.

受影响产品

• nltk nltk

参考链接

• https://github.com/nltk/nltk/security/advisories/GHSA-rf74-v2fm-23pw
• https://www.vulncheck.com/advisories/nltk-before-denial-of-service-via-jsontaggeddecoder
• https://github.com/nltk/nltk/security/advisories/GHSA-rf74-v2fm-23pw