GitHub Advisoryadvisory · PyPI

GHSA-4pxv-j86v-mhcw pypdf: Possible long runtimes for wrong size values in incremental mode

MEDIUM Published 2026-04-16 Modified 2026-05-05 Official page ↗
Aliases
CVE-2026-41313
Ecosystem
PyPI
Packages
pypdf
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weaknesses
CWE-834
Reviewed
2026-04-16

Affected packages

• PyPI pypdf: < 6.10.2 → fixed in 6.10.2

Description

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. Patches This has been fixed in pypdf==6.10.2. Workarounds If you cannot upgrade yet, consider applying the changes from PR #3735.

Related

Alias · CVE (1)

  • CVE-2026-41313 pypdf is a free and open-source pure-python PDF library. vulnerability

Weakness · CWE (1)

  • CWE-834 Excessive Iteration weakness

References