Allocation of Resources Without Limits or Throttling Affecting pypdf package, versions [,6.0.0)
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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- published14 Aug 2025
- disclosed13 Aug 2025
- creditLaura Kirsch
Introduced: 13 Aug 2025
NewCVE-2025-55197 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.0.0 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 due to the decompressed size for the FlateDecode filter. An attacker can cause excessive memory consumption by providing a crafted PDF file containing a series of malicious filters or cross-reference streams.
Note: This is exploitable if the file is read and the affected streams are processed.
Workaround
This vulnerability can be mitigated by including the fixed code from pypdf.filters.decompress into the existing filters file.