Improper Validation of Specified Quantity in Input Affecting pypdf package, versions [,6.10.1)
Threat Intelligence
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-16081092
- published21 Apr 2026
- disclosed15 Apr 2026
- creditalpakalee
Introduced: 15 Apr 2026
NewCVE-2026-41168 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.10.1 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 Validation of Specified Quantity in Input through the PdfReader object stream and xref stream parsers in pypdf/_reader.py. An attacker can trigger excessive allocation and recursive page/object processing by supplying a crafted PDF with oversized /N or /Index values in an object stream or cross-reference stream. This can crash or hang the parser as it tries to read far more entries than the stream contains, preventing the user from opening the document and consuming CPU and memory during parsing.