Asymmetric Resource Consumption (Amplification) Affecting pypdf package, versions [,6.21.3)
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-22132194
- published2 Nov 2026
- disclosed30 Oct 2026
- creditUnknown
Introduced: 30 Oct 2026
NewCVE-2026-119207 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.21.3 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 Asymmetric Resource Consumption (Amplification) via processing of malformed PDF dictionaries in pypdf/generic/_data_structures.py. When a dictionary object is left open (unclosed), error message accumulation during parsing can grow without bound, exhausting available memory and crashing the process. An attacker can trigger this condition by supplying a PDF file containing an unclosed dictionary to any application that parses it with this library.