CVE-2026-71852
Low
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause long runtimes and large memory consumption when pypdf/_font.py function Font._collect_cid_character_widths expands unusually large CID font /W width ranges or excessive width entries during text extraction. This issue is fixed in 6.15.0.
SeverityLow
CVSS3.3
Exploit probability—
ProductPypdf
PublishedAug 7, 2026
First seenAug 7, 2026
Weakness typeCWE-834CWE-834
How to fix
Update
- pypdf_project pypdf6.15.0 or later
- pypdf6.15.0 or later
- py-pdf pypdf6.15.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pypdf_project pypdf | v < 6.15.0 | 6.15.0 |
| pypdfPyPI | v < 6.15.0 | 6.15.0 |
| py-pdf pypdf | v < 6.15.0 | 6.15.0 |
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