NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-controlled paths. Attackers can read or write files outside allowed sandbox roots through TransitionParser, AveragedPerceptron, PerceptronTagger, and maxent parameter APIs when pathsec is enabled.
HIGH
Vulnerability intelligence
CVE-2026-81726
CVSS 4.08.3
SeverityHigh
Known exploitedNo
NVD references:
Primary source: NIST National Vulnerability Database