CVE-2026-48735
Medium
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.1, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements. This vulnerability is fixed in 6.12.1.
SeverityMedium
CVSS5.5
Exploit probability—
ProductPypdf
PublishedMay 28, 2026
First seenMay 28, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- pypdf_project pypdf6.12.1 or later
- pypdf6.12.1 or later
- py-pdf pypdf6.12.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pypdf_project pypdf | v < 6.12.1 | 6.12.1 |
| pypdfPyPI | v < 6.12.1 | 6.12.1 |
| py-pdf pypdf | v < 6.12.1 | 6.12.1 |
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