Allocation of Resources Without Limits or Throttling Affecting pypdf package, versions [,6.20.0)
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Allocation of Resources Without Limits or Throttling vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-PYTHON-PYPDF-21427272
- published22 Oct 2026
- disclosed21 Oct 2026
- creditPriyank N
Introduced: 21 Oct 2026
NewCVE-2026-113795 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.20.0 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 the decode_stream_data function in pypdf/filters.py, where a PDF stream containing an excessive number of chained filters or filters that expand data across multiple decode passes can cause unbounded CPU and memory consumption. An attacker can supply a malicious PDF that triggers this condition, crashing the process.