medium5.3
CVE-2026-40260
pypdf: Manipulated XMP metadata entity declarations can exhaust RAM
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | pypdf | < 6.10.0 | 6.10.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Pypdf Project | Pypdf | before 6.10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-3crg-w4f6-42mx
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx
- https://github.com/py-pdf/pypdf/pull/3724
- https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8
- https://github.com/py-pdf/pypdf/releases/tag/6.10.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-40260