| Package | Affected versions | Patched versions |
|---|---|---|
| pypdf | < 6.4.0 | 6.4.0 |
An attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter.
This is a follow up to GHSA-jfx9-29x2-rv3j to align the default limit with the one for zlib.
This has been fixed in pypdf==6.4.0.
If users cannot upgrade yet, use the line below to overwrite the default in their code:
pypdf.filters.LZW_MAX_OUTPUT_LENGTH = 75_000_000
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free