| Package | Affected versions | Patched versions |
|---|---|---|
| pypdf | < 6.7.1 | 6.7.1 |
| pypdf | < 6.7.1 | 6.7.1 |
An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction.
This has been fixed in pypdf==6.7.1.
If you cannot upgrade yet, consider applying the changes from PR #3646.
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