CVE-2025-14009 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2025-14009 Interim 1 1 2026-03-05T01:24:56Z current 2026-03-05T01:24:56Z 2026-03-05T01:24:56Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2025-14009 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. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://www.suse.com/support/security/rating/ SUSE Security Ratings SUSE Package Hub 15 SP6 openSUSE Leap 15.6 openSUSE Tumbleweed python3-nltk-3.7-bp156.4.6.1 python311-nltk-3.9.1-3.1 python312-nltk-3.9.1-3.1 python313-nltk-3.9.1-3.1 python3-nltk-3.7-bp156.4.6.1 as a component of SUSE Package Hub 15 SP6 python3-nltk-3.7-bp156.4.6.1 as a component of openSUSE Leap 15.6 python311-nltk-3.9.1-3.1 as a component of openSUSE Tumbleweed python312-nltk-3.9.1-3.1 as a component of openSUSE Tumbleweed python313-nltk-3.9.1-3.1 as a component of openSUSE Tumbleweed 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. CVE-2025-14009 SUSE Package Hub 15 SP6:python3-nltk-3.7-bp156.4.6.1 openSUSE Leap 15.6:python3-nltk-3.7-bp156.4.6.1 openSUSE Tumbleweed:python311-nltk-3.9.1-3.1 openSUSE Tumbleweed:python312-nltk-3.9.1-3.1 openSUSE Tumbleweed:python313-nltk-3.9.1-3.1 moderate