CVE-2026-71514

NLTK 3.9.4 through 3.10.2 contains a path traversal vulnerability in CrubadanCorpusReader._load_lang_ngrams . The function joins the corpus root with a value read from the corpus table.txt mapping file and opens the result using the builtin open() instead of the pathsec -validated opener. Because...

CVE-2026-71514 NLTK 3.9.4 through 3.10.2 Path Traversal via CrubadanCorpusReader pathsec Bypass

NLTK 3.9.4 through 3.10.2 contains a path traversal vulnerability in CrubadanCorpusReader. loadlangngrams joins the corpus root with crubadancode, the column-0 value read from the corpus table.txt mapping file, and opens the result with the builtin open rather than the pathsec-validated opener, s...

CVE-2026-71514 NLTK 3.9.4 through 3.10.2 Path Traversal via CrubadanCorpusReader pathsec Bypass

NLTK 3.9.4 through 3.10.2 contains a path traversal vulnerability in CrubadanCorpusReader. loadlangngrams joins the corpus root with crubadancode, the column-0 value read from the corpus table.txt mapping file, and opens the result with the builtin open rather than the pathsec-validated opener, s...

Linux Distros Unpatched Vulnerability : CVE-2026-62383

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely...

PT-2026-79563

Name of the Vulnerable Software and Affected Versions NLTK versions prior to 3.10.0 Description An arbitrary local file read issue exists in StreamBackedCorpusView where the system bypasses pathsec.ENFORCE by calling builtins.open directly instead of pathsec.open. Attackers who control the fileid...

Linux Distros Unpatched Vulnerability : CVE-2026-63312

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 contains an arbitrary local file read vulnerability in StreamBackedCorpusView that bypasses pathsec.ENFORCE by calling builtins.open directly...

The vulnerability of the validate_network_url() function in the nltk.pathsec component of the NLTK library for symbolic and statistical processing of natural language allows a attacker to perform an SSRF attack.

The vulnerability of the validatenetworkurl function in the nltk.pathsec component of the NLTK library, a software library for symbolic and statistical processing of natural language, is related to insufficient validation of requests on the server side. Exploiting this vulnerability may allow a...

PT-2026-79557

Name of the Vulnerable Software and Affected Versions nltk versions prior to 3.10.2 Description An arbitrary file read issue exists in the IPIPANCorpusReader methods that bypasses nltk.pathsec validation. An attacker can place a symlink in the corpus root directory to read arbitrary files...

Natural Language Toolkit (NLTK): DNS-rebinding SSRF filter bypass in nltk.pathsec.urlopen (nltk.download / nltk.data.load) defeats ENFORCE mode

Summary nltk.pathsec provides an SSRF filter that NLTK documents as a security control, blocking loopback, private, link-local, and multicast ranges including obfuscated forms and recommending strict ENFORCE mode for security-sensitive environments. The filter is bypassable by DNS rebinding:...