PT-2026-44399 · Py Pdf · Pypdf

Published 2026-05-28 · Updated 2026-05-28 · CVE-2026-48735

Mitre

CVSS v4.0

6.9

Medium

Base vector

AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.1, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements. This vulnerability is fixed in 6.12.1.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-48735

Affected Products

Pypdf

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-48735 · Security Note
• https://github.com/py-pdf/pypdf/releases/tag/6.12.1 · Note
• https://github.com/py-pdf/pypdf/pull/3796 · Note
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjqc-6w8f-h24c · Note