PT-2026-44392 · Py Pdf · Pypdf

Published 2026-05-28 · Updated 2026-05-28 · CVE-2026-48155

NVD

CVSS v4.0

4.8

Medium

Base vector

AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2026-48155

Affected Products

Pypdf

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-48155 · Security Note
• https://github.com/py-pdf/pypdf/pull/3790 · Note
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8 · Note
• https://github.com/py-pdf/pypdf/releases/tag/6.12.0 · Note