EUVD-2026-65229

NLTK: Unsafe Pickle Deserialization in TransitionParser Allows Remote Code Execution...

EUVD-2026-67076

NLTK: Model-artifact APIs bypass pathsec and touch files outside allowed roots...

GHSA-8MGP-746C-J5XP NLTK: Model-artifact APIs bypass pathsec and touch files outside allowed roots

Summary Several model-artifact APIs still treat caller-controlled model paths as ordinary filenames even when NLTK path security is enforced. The same outside-root paths are rejected by guarded helpers, but these public read and write flows still use raw file APIs. Details - Vulnerability type:...

NLTK: Model-artifact APIs bypass pathsec and touch files outside allowed roots

Summary Several model-artifact APIs still treat caller-controlled model paths as ordinary filenames even when NLTK path security is enforced. The same outside-root paths are rejected by guarded helpers, but these public read and write flows still use raw file APIs. Details - Vulnerability type:...

CVE-2026-71513

A flaw was found in NLTK. A remote attacker can achieve remote code execution by crafting untrusted transition-parser models. This vulnerability exists in the AllowlistUnpickler, which incorrectly validates only the pickle module string and not the global name. This allows attackers to bypass the...

CVE-2026-78683

NLTK before 3.10.0 affected versions =3.9.4 contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse method nltk/parse/transitionparser.py. The method calls pickleload with the default restricted=False, routing deserialization through WarningUnpickler, which does not...

DEBIAN-CVE-2026-78683

NLTK before 3.10.0 affected versions =3.9.4 contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse method nltk/parse/transitionparser.py. The method calls pickleload with the default restricted=False, routing deserialization through WarningUnpickler, which does not...

CVE-2026-78683 NLTK before 3.10.0 Remote Code Execution via Unsafe Pickle Deserialization

NLTK before 3.10.0 affected versions =3.9.4 contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse method nltk/parse/transitionparser.py. The method calls pickleload with the default restricted=False, routing deserialization through WarningUnpickler, which does not...

CVE-2026-78683

NLTK before 3.10.0 affected versions =3.9.4 contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse method nltk/parse/transitionparser.py. The method calls pickleload with the default restricted=False, routing deserialization through WarningUnpickler, which does not...

CVE-2026-78683 NLTK before 3.10.0 Remote Code Execution via Unsafe Pickle Deserialization

NLTK before 3.10.0 affected versions =3.9.4 contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse method nltk/parse/transitionparser.py. The method calls pickleload with the default restricted=False, routing deserialization through WarningUnpickler, which does not...

CVE-2026-78683

NLTK versions ≤3.9.4 contain an unsafe pickle deserialization vulnerability in the TransitionParser.parse() method (nltk/parse/transitionparser.py). The method calls pickle_load() with restricted=False, routing through WarningUnpickler , which does not override find_class() and thus permits arbit...

PT-2026-81158

Name of the Vulnerable Software and Affected Versions NLTK versions prior to 3.10.0 Description An unsafe pickle deserialization issue exists in the TransitionParser.parse function. The function utilizes pickle load with the restricted parameter set to False, which directs deserialization through...

Linux Distros Unpatched Vulnerability : CVE-2026-78683

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - NLTK before 3.10.0 affected versions =3.9.4 contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse method...

GHSA-5GH2-94QG-QPPQ NLTK AllowlistUnpickler dotted-name validation bypass allows remote code execution

NLTK before 3.10.3 contains a remote code execution vulnerability in AllowlistUnpickler that validates only the pickle module string and not the global name, allowing attackers to resolve dotted names by attribute traversal to callables outside the allowlisted namespace. Attackers can craft...

CVE-2026-71513 NLTK 3.10.0 through 3.10.2 Remote Code Execution via AllowlistUnpickler Dotted-Name Bypass

NLTK before 3.10.3 contains a remote code execution vulnerability in AllowlistUnpickler that validates only the pickle module string and not the global name, allowing attackers to resolve dotted names by attribute traversal to callables outside the allowlisted namespace. Attackers can craft...

EUVD-2026-64296

NLTK before 3.10.3 contains a remote code execution vulnerability in AllowlistUnpickler that validates only the pickle module string and not the global name, allowing attackers to resolve dotted names by attribute traversal to callables outside the allowlisted namespace. Attackers can craft...

CVE-2026-71513 NLTK 3.10.0 through 3.10.2 Remote Code Execution via AllowlistUnpickler Dotted-Name Bypass

NLTK before 3.10.3 contains a remote code execution vulnerability in AllowlistUnpickler that validates only the pickle module string and not the global name, allowing attackers to resolve dotted names by attribute traversal to callables outside the allowlisted namespace. Attackers can craft...

CVE-2026-71513

NLTK versions 3.10.0 through 3.10.2 contain a remote code execution vulnerability in the AllowlistUnpickler component (picklesec.py). The root cause is that the allowlist validation checks only the pickle module string but not the global name, enabling attackers to resolve dotted names via attrib...