Allocation of Resources Without Limits or Throttling Affecting pypdf package, versions [,6.21.0)
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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Start learning- Snyk IDSNYK-PYTHON-PYPDF-21427279
- published22 Oct 2026
- disclosed21 Oct 2026
- creditAmmar Chechatwala
Introduced: 21 Oct 2026
NewCVE-2026-113790 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.21.0 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 Allocation of Resources Without Limits or Throttling via unbounded stream parsing in the PDF content stream parser, which imposes no limit on the total number of tokens, array elements, or dictionary key-value pairs processed per stream. An attacker can supply a PDF containing a stream that generates an excessive number of parsed objects, causing unbounded memory consumption and crashing the process.