GitHub Advisoryadvisory · PyPI

GHSA-5jq2-8x83-x246 pypdf: Possible long runtimes/large memory usage when parsing indirect objects

HIGH Published 2026-10-01 Modified 2026-10-01 Official page ↗
Aliases
CVE-2026-102994
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-407
Reviewed
2026-10-01

Affected packages

• PyPI pypdf: < 6.18.0 → fixed in 6.18.0

Description

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires reading a PDF document with long indirect object headers, not terminated by whitespace. Patches This has been fixed in pypdf==6.18.0. Workarounds If you cannot upgrade yet, consider applying the changes from PR #4055.

Related

Alias · CVE (1)

  • CVE-2026-102994 pypdf is a free and open-source pure-python PDF library. vulnerability

Weakness · CWE (2)

  • CWE-400 Uncontrolled Resource Consumption weakness
  • CWE-407 Inefficient Algorithmic Complexity weakness

References