NLTK: Uncontrolled search path when invoking the Graphviz 'dot' binary

Two NLTK sites executed the Graphviz dot program by bare name, so process creation resolved it via the search path — and on Windows via the current working directory — rather than a validated absolute location. An attacker who can place a file named dot where resolution looks the CWD on Windows, ...

DEBIAN-CVE-2026-78680

NLTK versions before 3.10.3 fail to use validated absolute paths when invoking the Graphviz dot binary in dependencygraph.dot2img and AlignedSent.reprsvg, allowing attackers to execute arbitrary code by placing a malicious dot binary in the search path or current working directory. Attackers can...

CVE-2026-78680

NLTK versions before 3.10.3 are vulnerable to arbitrary code execution via the Graphviz dot binary . The root cause is that dependencygraph.dot2img and AlignedSent._repr_svg_ invoke dot using a bare name rather than a validated absolute path. On Windows , an attacker can place a malicious dot bin...