NL
Product
nltk
by nltk · last CVE Oct 13, 2026
46
CVEs
0
On KEV
10.0
Max CVSS
1
New 30D
Severity mix
Critical 4High 28Medium 10Low 4
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-0848
10.0
1%
Mar 5
Arbitrary Code Execution in NLTK StanfordSegmenter via Untrusted JAR Loading
Affected: through 3.9.2
CVE-2026-79675
9.8
1%
Aug 25
NLTK before 3.10.3 JVM Argument Injection via Per-Call Options
Affected: before 3.10.3
CVE-2026-79657
9.8
1%
Aug 25
NLTK before 3.10.3 Remote Code Execution via Unsafe Pickle Deserialization
Affected: before 3.10.3
CVE-2026-78683
9.6
1%
Aug 25
NLTK before 3.10.0 Remote Code Execution via Unsafe Pickle Deserialization
Affected: before 3.10.0
CVE-2026-71513
8.8
1%
Aug 22
NLTK 3.10.0 through 3.10.2 Remote Code Execution via AllowlistUnpickler Dotted-Name Bypass
Affected: 3.10.0 before 3.10.3
CVE-2025-14009
8.8
1%
Feb 18
Zip Slip Vulnerability in nltk/nltk Leading to Remote Code Execution
Affected: before 3.9.3
CVE-2026-79674
8.2
0%
Aug 25
NLTK 3.10.2 Path Traversal via corpus-reader constructors
Affected: before 3.10.3
CVE-2026-33236
8.1
1%
Mar 20
NLTK has a Downloader Path Traversal Vulnerability (AFO) - Arbitrary File Overwrite
Affected: <= 3.9.3
CVE-2026-78680
7.8
0%
Aug 25
NLTK before 3.10.3 Arbitrary Code Execution via Graphviz dot Binary
Affected: before 3.10.3
CVE-2025-71408
7.8
0%
Jul 24
NLTK < 3.9.3 Eval Injection via collocations.py Command-Line Arguments
Affected: before 3.9.3
CVE-2026-12252
7.8
0%
Jul 4
Untrusted JAR Code Execution in Multiple Stanford Interface Classes in nltk/nltk
Affected: through 3.9.3
CVE-2026-81722
7.5
1%
Aug 27
nltk PorterStemmer before 3.10.3 Quadratic-time DoS
Affected: before 3.10.3
CVE-2026-80205
7.5
1%
Aug 26
NLTK before 3.10.0 ReDoS via Text.findall() unvalidated regex
Affected: before 3.10.0
CVE-2026-78682
7.5
0%
Aug 25
NLTK before 3.10.3 SSRF Protection Bypass via Proxy
Affected: before 3.10.3
CVE-2026-78681
7.5
1%
Aug 25
NLTK before 3.10.3 Entity Expansion DoS via ElementTree
Affected: before 3.10.3
CVE-2026-66393
7.5
1%
Aug 22
NLTK before 3.9.4 Denial of Service via JSONTaggedDecoder
Affected: before 3.9.4
CVE-2026-63312
7.5
1%
Aug 22
NLTK StreamBackedCorpusView Bypasses pathsec.ENFORCE Arbitrary File Read
Affected: before 3.10.0
CVE-2026-62388
7.5
1%
Aug 22
NLTK before 3.10.0 Insecure Default Configuration in pathsec.py
Affected: before 3.10.0
CVE-2026-62385
7.5
0%
Aug 22
NLTK 3.9.4 Path Traversal via FrameNet and NKJP Readers
Affected: before 3.10.0
CVE-2026-62384
7.5
1%
Aug 22
NLTK FramenetCorpusReader Symlink Sandbox Bypass before 3.10.2
Affected: 3.10.0 before 3.10.2
CVE-2026-72818
7.5
1%
Aug 20
NLTK TweetTokenizer URL Pattern Backtracks Catastrophically on Naked-Domain-Like Input
Affected: before 3.10.1
CVE-2026-54293
7.5
1%
Jun 22
NLTK: URL-Encoded Path Traversal in nltk.data.load() Allows Arbitrary Local File Read
Affected: < 3.10.0-rc1
CVE-2026-33231
7.5
1%
Mar 20
NLTK has unauthenticated remote shutdown in nltk.app.wordnet_app
Affected: <= 3.9.3
CVE-2026-0846
7.5
1%
Mar 9
Arbitrary File Read via Absolute Path Input in nltk.util.filestring()
Affected: 3.9.2
CVE-2026-0847
7.5
1%
Mar 4
Path Traversal in nltk/nltk
Affected: through 3.9.2
CVE-2021-3842
7.5
1%
Jan 4
nltk is vulnerable to Inefficient Regular Expression Complexity
Affected: before 3.6.6
CVE-2021-43854
7.5
3%
Dec 23
NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing
Affected: before 3.6.5
CVE-2021-3828
7.5
2%
Sep 27
nltk is vulnerable to Inefficient Regular Expression Complexity
Affected: through 3.6.3
CVE-2019-14751
7.5
6%
Aug 22
NLTK Downloader before 3.4.5 is vulnerable to a directory traversal, allowing attackers to write arbitrary files via a ../ (dot dot slash) in an NLTK package (ZIP archive) that is…
Affected: before 3.4.5
CVE-2026-81727
7.1
0%
Aug 27
NLTK before 3.10.3 Hardlink File Overwrite via downloader
Affected: before 3.10.3
CVE-2026-109956
7.0
0%
Oct 13
NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path
Affected: through 3.10.3
CVE-2026-81726
7.0
0%
Aug 27
NLTK through 3.10.3 Path Traversal via Model-Artifact APIs
Affected: through 3.10.3
CVE-2026-65915
6.5
0%
Aug 22
NLTK before 3.10.0 Arbitrary File Read via FileSystemPathPointer
Affected: before 3.10.0
CVE-2026-12261
6.5
0%
Aug 7
Improper Access Control in nltk/nltk
Affected: through 3.9.4
CVE-2026-12259
6.5
0%
Aug 3
Improper Input Validation in nltk/nltk
Affected: 3.9.4
CVE-2026-70626
6.2
0%
Aug 22
NLTK before 3.9.4 Symlink Escape via CorpusReader
Affected: before 3.9.4
CVE-2026-33230
6.1
0%
Mar 20
nltk Vulnerable to Cross-site Scripting
Affected: <= 3.9.3
CVE-2026-80206
5.9
0%
Aug 26
NLTK 3.10.2 Regular Expression Denial of Service via tgrep
Affected: before 3.10.3
CVE-2026-79676
5.9
0%
Aug 25
NLTK before 3.10.3 Path Traversal via Symlink Bypass
Affected: before 3.10.3
CVE-2026-62383
5.5
0%
Aug 22
nltk IPIPANCorpusReader Symlink Arbitrary File Read
Affected: 3.10.0 before 3.10.2
CVE-2026-81724
5.3
0%
Aug 27
NLTK before 3.10.3 Denial of Service via Uncontrolled Recursion
Affected: before 3.10.3
CVE-2026-63311
5.3
0%
Aug 22
NLTK before 3.10.0 SSRF via DNS Resolution Failure
Affected: before 3.10.0
CVE-2026-81725
3.7
0%
Aug 27
NLTK before 3.10.3 Regular Expression Denial of Service via Pl196xCorpusReader
Affected: before 3.10.3
CVE-2026-81723
3.7
0%
Aug 27
NLTK before 3.10.3 Quadratic CPU Exhaustion via XMLCorpusView
Affected: before 3.10.3
CVE-2026-12372
3.7
0%
Aug 9
Server-Side Request Forgery (SSRF) in nltk/nltk
Affected: 3.9.4
CVE-2026-71514
3.3
0%
Aug 22
NLTK 3.9.4 through 3.10.2 Path Traversal via CrubadanCorpusReader pathsec Bypass
Affected: 3.9.4 before 3.10.3
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