Excessive Iteration Affecting pypdf package, versions [,6.16.1)
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-19499098
- published2 Sept 2026
- disclosed1 Sept 2026
- creditEzinne Kalu
Introduced: 1 Sep 2026
NewCVE-2026-84311 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.16.1 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 Excessive Iteration in its text extraction of pages that contain XForm objects, which processes those objects without limiting the work across reused ones. An attacker can cause long runtimes and large memory consumption by supplying a PDF whose page contains many XForm objects, particularly ones reused throughout the document. This requires the application to extract text from a page holding multiple, reused XForm objects.