GitHub Advisoryadvisory · PyPI

GHSA-j543-4vmf-qm7v pypdf: Possible large memory usage for form XObjects during text extraction

MEDIUM Published 2026-06-16 Modified 2026-06-16 Official page ↗
Aliases
CVE-2026-49461
Ecosystem
PyPI
Packages
pypdf
Severity
Moderate
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weaknesses
CWE-400
Reviewed
2026-06-16

Affected packages

• PyPI pypdf: < 6.12.2 → fixed in 6.12.2

Description

Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references. Patches This has been fixed in pypdf==6.12.2. Workarounds If you cannot upgrade yet, consider applying the changes from PR #3805.

Related

Alias · CVE (1)

  • CVE-2026-49461 pypdf is a free and open-source pure-python PDF library. vulnerability

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References