GitHub Advisoryadvisory · PyPI

GHSA-qv6h-rv94-w285 pypdf: Possible large memory usage when retrieving Roman page labels

HIGH Published 2026-10-01 Modified 2026-10-01 Official page ↗
Aliases
CVE-2026-102993
Ecosystem
PyPI
Packages
pypdf
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weaknesses
CWE-400, CWE-770
Reviewed
2026-10-01

Affected packages

• PyPI pypdf: < 6.17.0 → fixed in 6.17.0

Description

Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires accessing the page labels of a document with large Roman numerals. Patches This has been fixed in pypdf==6.17.0. Workarounds If you cannot upgrade yet, consider applying the changes from PR #4047.

Related

Alias · CVE (1)

  • CVE-2026-102993 pypdf is a free and open-source pure-python PDF library. vulnerability

Weakness · CWE (2)

  • CWE-400 Uncontrolled Resource Consumption weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References