Security Advisory

CVE-2026-78681

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-25 01:30:37

Last updated 2026-08-26 16:12:19

Assigner VulnCheck

CVSS score 8.7

State PUBLISHED

Description

NLTK versions before 3.10.3 use xml.etree.ElementTree to parse XML in multiple modules, which honors entity declarations in document DTDs. Attackers can craft XML payloads with nested entity declarations that expand from hundreds of bytes to megabytes in memory, causing denial of service.

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