CVE-2026-48155

MediumCVSS 5.5/10Last modified Nov 2, 2026

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400

Affected software

Vendor	Product	Versions
py-pdf	pypdf	< 6.12.0

References

https://github.com/py-pdf/pypdf/pull/3790Issue Tracking, Patch
https://github.com/py-pdf/pypdf/releases/tag/6.12.0Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8Patch, Vendor Advisory

Timeline

Published: May 28, 2026
Last modified: Nov 2, 2026
NVD status: Analyzed

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