XML Entity Expansion Affecting pypdf package, versions [,6.10.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-PYPDF-15989793
- published12 Apr 2026
- disclosed10 Apr 2026
- creditkodareef5
Introduced: 10 Apr 2026
CVE-2026-40260 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.10.0 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 XML Entity Expansion when parsing XMP metadata. An attacker can cause excessive memory consumption with excessive DOCTYPE entity declarations.