PT-2026-34566 · Pypi · Pypdf

L3B4Nk4 · Published 2026-04-16 · Updated 2026-06-04 · CVE-2026-41313

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.10.2

Description A flaw in the pure-python PDF library allows an attacker to craft a PDF that causes long runtimes. This occurs when loading a PDF in incremental mode that contains a large /Size value in the trailer.

Recommendations Update to version 6.10.2. Apply the changes from the patch manually as a workaround.

Fix

Weakness Enumeration

CWE-834

Related Identifiers

CVE-2026-41313

GHSA-4PXV-J86V-MHCW

Affected Products

Pypdf

References · 14

• https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a · Patch
• https://github.com/py-pdf/pypdf/pull/3735 · Patch
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-41313 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-41313 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-APP-PYPI-CVE-2026-41313 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-41313 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-41313 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-41313 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-41313 · Security Note
• https://osv.dev/vulnerability/GHSA-4pxv-j86v-mhcw · Vendor Advisory
• https://github.com/py-pdf/pypdf · Note
• https://github.com/py-pdf/pypdf/releases/tag/6.10.2 · Note
• https://twitter.com/CVEnew/status/2047359940495294943 · Twitter Post