VULNERABILITY INTELLIGENCE
CVE-2026-78680
CVSS score7.8 HIGH
EPSS probability0.18%
CISA KEVNot currently listed
Published2026-08-25
Last modified2026-10-12
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
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.
Weakness classification
- disclosure@vulncheck.com: CWE-426