Allocation of Resources Without Limits or Throttling Affecting pypdf package, versions [,6.19.0)
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
- creditmanop55555
Introduced: 1 Oct 2026
NewCVE-2026-102998 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.19.0 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 appearance stream rendering loop in _appearance_stream.py, where _unicode_to_glyph_id is called on every iteration of the loop body rather than once before the loop. An attacker supplying a PDF with a large number of text lines and a selection value can trigger repeated, redundant computation of the glyph ID mapping, causing excessive CPU consumption and crashing the process.