Infinite loop Affecting pypdf package, versions [,6.9.2)
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-15766701
- published26 Mar 2026
- disclosed25 Mar 2026
- creditKevin Cao
Introduced: 25 Mar 2026
NewCVE-2026-33699 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.9.2 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 Infinite loop in the read_from_stream function of DictionaryObject. An attacker can cause the application to enter an infinite loop by providing a specially crafted PDF file when the file is read in non-strict mode.
Note:
This is only exploitable if non-strict mode is enabled.