Allocation of Resources Without Limits or Throttling Affecting pypdf package, versions [,6.17.0)
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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- published3 Oct 2026
- disclosed1 Oct 2026
- creditNivid42
Introduced: 1 Oct 2026
NewCVE-2026-102993 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.17.0 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 number2uppercase_roman_numeral in _page_labels.py, where an unbounded Roman numeral value accepted from a PDF's page label structure causes uncontrolled resource consumption. An attacker can supply a malformed PDF containing an arbitrarily large /St (start) value in a page label /Nums entry, triggering the function to loop and allocate an unbounded string, crashing the process.