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VULNERABILITIES

CVE-2026-78680 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/nltk/nltk/security/advisories/GHSA-6hwm-xvph-95vm CISA-ADP
https://github.com/nltk/nltk/security/advisories/GHSA-6hwm-xvph-95vm [email protected]
https://www.vulncheck.com/advisories/nltk-before-arbitrary-code-execution-via-graphviz-dot-binary [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-426Untrusted Search Path[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-78680
NVD Published Date:
Aug 25, 2026
NVD Last Modified:
Sep 23, 2026
Source:
[email protected]
CVE-2026-78680 Details - Not Deferred