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VulnScan

nltk Security Vulnerabilities | CyStack CVE Database

Vulnerability	Exploitation status	Fix	Affected product	Published	Severity

`CVE-2026-81727`NLTK before 3.10.3 Hardlink File Overwrite via downloader	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/27/2026	SeverityMedium
`CVE-2026-81726`NLTK through 3.10.3 Path Traversal via Model-Artifact APIs	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/27/2026	SeverityHigh
`CVE-2026-81725`NLTK before 3.10.3 Regular Expression Denial of Service via Pl196xCorpusReader	Exploitation statusNot known exploited	FixYes	Affected productnltk	Published08/27/2026	SeverityMedium
`CVE-2026-81724`NLTK before 3.10.3 Denial of Service via Uncontrolled Recursion	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/27/2026	SeverityMedium
`CVE-2026-81723`NLTK before 3.10.3 Quadratic CPU Exhaustion via XMLCorpusView	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/27/2026	SeverityMedium
`CVE-2026-81722`nltk PorterStemmer before 3.10.3 Quadratic-time DoS	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/27/2026	SeverityHigh
`CVE-2026-80206`NLTK 3.10.2 Regular Expression Denial of Service via tgrep	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/26/2026	SeverityHigh
`CVE-2026-80205`NLTK before 3.10.0 ReDoS via Text.findall() unvalidated regex	Exploitation statusNot known exploited	FixYes	Affected productnltk	Published08/26/2026	SeverityHigh
`CVE-2026-79676`NLTK before 3.10.3 Path Traversal via Symlink Bypass	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/25/2026	SeverityHigh
`CVE-2026-79675`NLTK before 3.10.3 JVM Argument Injection via Per-Call Options	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/25/2026	SeverityCritical
`CVE-2026-79674`NLTK 3.10.2 Path Traversal via corpus-reader constructors	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/25/2026	SeverityHigh
`CVE-2026-79657`NLTK before 3.10.3 Remote Code Execution via Unsafe Pickle Deserialization	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/25/2026	SeverityCritical
`CVE-2026-78683`NLTK before 3.10.0 Remote Code Execution via Unsafe Pickle Deserialization	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/25/2026	SeverityCritical
`CVE-2026-78682`NLTK before 3.10.3 SSRF Protection Bypass via Proxy	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/25/2026	SeverityHigh
`CVE-2026-78681`NLTK before 3.10.3 Entity Expansion DoS via ElementTree	Exploitation statusNot known exploited	FixYes	Affected productnltk	Published08/25/2026	SeverityHigh
`CVE-2026-78680`NLTK before 3.10.3 Arbitrary Code Execution via Graphviz dot Binary	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/25/2026	SeverityHigh
`CVE-2026-70626`NLTK before 3.9.4 Symlink Escape via CorpusReader	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/22/2026	SeverityHigh
`CVE-2026-66393`NLTK before 3.9.4 Denial of Service via JSONTaggedDecoder	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/22/2026	SeverityHigh
`CVE-2026-65915`NLTK before 3.10.0 Arbitrary File Read via FileSystemPathPointer	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/22/2026	SeverityHigh
`CVE-2026-63312`NLTK StreamBackedCorpusView Bypasses pathsec.ENFORCE Arbitrary File Read	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/22/2026	SeverityHigh
`CVE-2026-63311`NLTK before 3.10.0 SSRF via DNS Resolution Failure	Exploitation statusNot known exploited	FixYes	Affected productnltk	Published08/22/2026	SeverityMedium
`CVE-2026-63310`	Exploitation statusNot confirmed	FixNot confirmed	Affected productNot confirmed	Published08/22/2026	SeverityUnknown
`CVE-2026-62388`NLTK before 3.10.0 Insecure Default Configuration in pathsec.py	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/22/2026	SeverityHigh
`CVE-2026-62385`NLTK 3.9.4 Path Traversal via FrameNet and NKJP Readers	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/22/2026	SeverityHigh
`CVE-2026-62384`NLTK FramenetCorpusReader Symlink Sandbox Bypass before 3.10.2	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/22/2026	SeverityHigh
`CVE-2026-62383`nltk IPIPANCorpusReader Symlink Arbitrary File Read	Exploitation statusNot known exploited	FixYes	Affected productnltk	Published08/22/2026	SeverityMedium
`CVE-2026-71514`NLTK 3.9.4 through 3.10.2 Path Traversal via CrubadanCorpusReader pathsec Bypass	Exploitation statusNot known exploited	FixYes	Affected productnltk	Published08/22/2026	SeverityLow
`CVE-2026-71513`NLTK 3.10.0 through 3.10.2 Remote Code Execution via AllowlistUnpickler Dotted-Name Bypass	Exploitation statusNot known exploited	FixYes	Affected productnltk	Published08/22/2026	SeverityHigh
`CVE-2026-72818`NLTK TweetTokenizer URL Pattern Backtracks Catastrophically on Naked-Domain-Like Input	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published08/20/2026	SeverityHigh
`CVE-2026-12372`Server-Side Request Forgery (SSRF) in nltk/nltk	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk/nltk	Published08/09/2026	SeverityLow
`CVE-2026-12261`Improper Access Control in nltk/nltk	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk/nltk	Published08/07/2026	SeverityMedium
`CVE-2026-12259`Improper Input Validation in nltk/nltk	Exploitation statusNot known exploited	FixNot confirmed	Affected productnltk/nltk	Published08/03/2026	SeverityMedium
`CVE-2025-71408`NLTK < 3.9.3 Eval Injection via collocations.py Command-Line Arguments	Exploitation statusPublic exploit	FixYes	Affected productntlk	Published07/24/2026	SeverityHigh
`CVE-2026-12252`Untrusted JAR Code Execution in Multiple Stanford Interface Classes in nltk/nltk	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk/nltk	Published07/04/2026	SeverityHigh
`CVE-2026-12243`	Exploitation statusNot confirmed	FixNot confirmed	Affected productNot confirmed	Published06/30/2026	SeverityUnknown
`CVE-2026-54293`NLTK: URL-Encoded Path Traversal in nltk.data.load() Allows Arbitrary Local File Read	Exploitation statusPublic exploit	FixYes	Affected productnltk	Published06/22/2026	SeverityHigh
`CVE-2026-12199`Unauthenticated Denial of Service in nltk.app.wordnet_app	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk/nltk	Published06/17/2026	SeverityHigh
`CVE-2026-33236`NLTK has a Downloader Path Traversal Vulnerability (AFO) - Arbitrary File Overwrite	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk	Published03/20/2026	SeverityHigh
`CVE-2026-33231`NLTK has unauthenticated remote shutdown in nltk.app.wordnet_app	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk	Published03/20/2026	SeverityHigh
`CVE-2026-33230`nltk Vulnerable to Cross-site Scripting	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk	Published03/20/2026	SeverityMedium
`CVE-2026-0846`Arbitrary File Read via Absolute Path Input in nltk.util.filestring()	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk/nltk	Published03/09/2026	SeverityHigh
`CVE-2026-0848`Arbitrary Code Execution in NLTK StanfordSegmenter via Untrusted JAR Loading	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk/nltk	Published03/05/2026	SeverityCritical
`CVE-2026-0847`Path Traversal in nltk/nltk	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk/nltk	Published03/04/2026	SeverityHigh
`CVE-2025-14009`Zip Slip Vulnerability in nltk/nltk Leading to Remote Code Execution	Exploitation statusPublic exploit	FixNot confirmed	Affected productnltk/nltk	Published02/18/2026	SeverityCritical
`CVE-2021-3842`Inefficient Regular Expression Complexity in nltk/nltk	Exploitation statusNot confirmed	FixYes	Affected productnltk/nltk	Published01/04/2022	SeverityHigh
`CVE-2021-43854`Inefficient Regular Expression Complexity in nltk	Exploitation statusNot confirmed	FixNot confirmed	Affected productnltk	Published12/23/2021	SeverityHigh
`CVE-2021-3828`Inefficient Regular Expression Complexity in nltk/nltk	Exploitation statusNot confirmed	FixNot confirmed	Affected productnltk/nltk	Published09/27/2021	SeverityHigh
`CVE-2019-14751`	Exploitation statusNot confirmed	FixNot confirmed	Affected productNot confirmed	Published08/22/2019	SeverityUnknown

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