# CVE-2026-40260

## Summary

- **CVE ID:** CVE-2026-40260
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N)
- **CWE:** CWE-776
- **Published:** Apr 16, 2026
- **Last Modified:** Apr 17, 2026

## 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.

## Affected Products

- py-pdf — pypdf (< 6.10.0)

## References

- [CNA](https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx)
- [CNA](https://github.com/py-pdf/pypdf/pull/3724)
- [CNA](https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8)
- [CNA](https://github.com/py-pdf/pypdf/releases/tag/6.10.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 35.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._