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CVE Vulnerability Details :
CVE-2025-14009
PUBLISHED
More InfoOfficial Page
Assigner-@huntr_ai
Assigner Org ID-c09c270a-b464-47c1-9133-acb35b22c19a
View Known Exploited Vulnerability (KEV) details
Published At-18 Feb, 2026 | 17:45
Updated At-18 Feb, 2026 | 19:10
Rejected At-
▼CVE Numbering Authority (CNA)
Zip Slip Vulnerability in nltk/nltk Leading to Remote Code Execution

A critical vulnerability exists in the NLTK downloader component of nltk/nltk, affecting all versions. The _unzip_iter function in nltk/downloader.py uses zipfile.extractall() without performing path validation or security checks. This allows attackers to craft malicious zip packages that, when downloaded and extracted by NLTK, can execute arbitrary code. The vulnerability arises because NLTK assumes all downloaded packages are trusted and extracts them without validation. If a malicious package contains Python files, such as __init__.py, these files are executed automatically upon import, leading to remote code execution. This issue can result in full system compromise, including file system access, network access, and potential persistence mechanisms.

Affected Products
Vendor
nltk
Product
nltk/nltk
Versions
Affected
  • From unspecified through latest (custom)
Problem Types
TypeCWE IDDescription
CWECWE-94CWE-94 Improper Control of Generation of Code
Type: CWE
CWE ID: CWE-94
Description: CWE-94 Improper Control of Generation of Code
Metrics
VersionBase scoreBase severityVector
3.010.0CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Version: 3.0
Base score: 10.0
Base severity: CRITICAL
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://huntr.com/bounties/49ecbc02-054e-4470-b2e0-b267936cc4e4
N/A
Hyperlink: https://huntr.com/bounties/49ecbc02-054e-4470-b2e0-b267936cc4e4
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://huntr.com/bounties/49ecbc02-054e-4470-b2e0-b267936cc4e4
exploit
Hyperlink: https://huntr.com/bounties/49ecbc02-054e-4470-b2e0-b267936cc4e4
Resource:
exploit
Details not found