Allocation of Resources Without Limits or Throttling Affecting pypdf package, versions [,6.7.4)
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- published1 Mar 2026
- disclosed28 Feb 2026
- creditbugbunny-research
Introduced: 28 Feb 2026
NewCVE-2026-28351 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.7.4 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 in the RunLengthDecode filter, implemented in filters.py. An attacker can cause excessive memory consumption by submitting a malicious PDF file containing a compressed payload that is very large when uncompressed.
Note:
This is only exploitable if the content stream is parsed using the RunLengthDecode filter.