Improper Handling of Highly Compressed Data (Data Amplification) Affecting pypdf package, versions [,6.1.3)
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Test your applications- Snyk IDSNYK-PYTHON-PYPDF-13658706
- published23 Oct 2025
- disclosed22 Oct 2025
- creditChenhao tylzh97, Stefan stefan6419846
Introduced: 22 Oct 2025
NewCVE-2025-62708 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade pypdf to version 6.1.3 or higher.
Overview
pypdf is an A pure-python PDF library capable of splitting, merging, cropping, and transforming PDF files
Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data (Data Amplification) in the LZWDecode process. An attacker can cause excessive memory consumption by submitting a specially crafted PDF file containing manipulated LZWDecode streams. This is only exploitable if the content stream of a page is parsed using the LZWDecode filter.