CVE-2026-40260
Medium
Description
pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has been fixed in version 6.10.0.
SeverityMedium
CVSS5.3
Exploit probability—
ProductPypdf
PublishedApr 17, 2026
First seenApr 17, 2026
Weakness typeCWE-776CWE-776
How to fix
Update
- pypdf_project pypdf6.10.0 or later
- pypdf6.10.0 or later
- py-pdf pypdf6.10.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pypdf_project pypdf | v < 6.10.0 | 6.10.0 |
| pypdfPyPI | v < 6.10.0 | 6.10.0 |
| py-pdf pypdf | v < 6.10.0 | 6.10.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.