CVE-2026-81726

Description

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.

CVSS Vector

References

• https://github.com/nltk/nltk/security/advisories/GHSA-8mgp-746c-j5xp
• https://www.vulncheck.com/advisories/nltk-through-3.10.3-path-traversal-via-model-artifact-apis
• https://github.com/nltk/nltk/security/advisories/GHSA-8mgp-746c-j5xp