NLTK: WekaClassifier passes an unvalidated caller-controlled model path to the weka JVM, bypassing nltk.pathsec containment

Summary WekaClassifier in NLTK passes a caller-controlled model file path to the weka Java VM without any nltk.pathsec validation. WekaClassifier.train puts the caller's modelfilename verbatim into the weka argv "-d", modelfilename, ... weka writes the trained model there, and...

GHSA-J456-XH4H-CPF2 NLTK: WekaClassifier passes an unvalidated caller-controlled model path to the weka JVM, bypassing nltk.pathsec containment

Summary WekaClassifier in NLTK passes a caller-controlled model file path to the weka Java VM without any nltk.pathsec validation. WekaClassifier.train puts the caller's modelfilename verbatim into the weka argv "-d", modelfilename, ... weka writes the trained model there, and...

WNLTK WekaClassifier File Read Write

The vulnerability of the WekaClassifier module in the NLTK library for symbolic and statistical processing of natural language is related to an incorrect restriction on the path name to the directory. Exploiting this vulnerability could allow a malicious actor to gain unauthorized access to read...

SUSE CVE-2026-109956

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

Linux Distros Unpatched Vulnerability : CVE-2026-109956

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated...

CVE-2026-109956

A flaw was found in NLTK. A path traversal vulnerability in the WekaClassifier module allows an attacker to bypass directory containment restrictions by supplying unvalidated model paths. By controlling these path arguments, an attacker can write arbitrary files or probe existing files outside of...

CVE-2026-109956

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

DEBIAN-CVE-2026-109956

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

UBUNTU-CVE-2026-109956

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

CVE-2026-109956

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

CVE-2026-109956 NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

EUVD-2026-98660

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

CVE-2026-109956

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

CVE-2026-109956 NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

CVE-2026-109956 NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

Directory Traversal

Overview nltk is a Natural Language Toolkit NLTK is a Python package for natural language processing. Affected versions of this package are vulnerable to Directory Traversal via WekaClassifier in nltk/classify/weka.py, which passes a caller-controlled model filename directly to the Weka JVM as a ...

CVE-2026-109956

The NLTK library (versions through 3.10.3 ) contains a path traversal vulnerability within the WekaClassifier component. The root cause is the use of unvalidated model paths, which allows attackers to bypass nltk.pathsec containment. By controlling the model_filename or model argument, an attacke...

CVE-2026-109956

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

CVE-2026-109956: Improper Limitation of a Pathname to a Restricted Directory

NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the modelfilename or model argument can make the weka JVM write files via -d or probe files via -l...

Natural Language Toolkit path traversal vulnerability

NLTK versions 3.10.3 and earlier have a path traversal vulnerability. This vulnerability arises from WekaClassifier not verifying the model path. Attackers can bypass the nltk.pathsec restriction by controlling the modelfilename or model parameter, allowing for path traversal. This may result in...