CVE-2026-78680

Fixed in a distro release EPSS <1%CVSS 7.8

NLTK versions before 3.10.3 fail to use validated absolute paths when invoking the Graphviz dot binary in dependencygraph.dot2img and AlignedSent._repr_svg_, allowing attackers to execute arbitrary code by placing a malicious dot binary in the search path or current working directory. Attackers can exploit bare-name binary resolution on Windows via the current working directory or on Unix-like systems via relative PATH entries to execute their binary instead of the legitimate Graphviz tool.

Published 2026-08-25 · CVE record · OSV

Products: nltk

Fixed upstream

Distro releases