CVE-2026-59938

Summary

pypdf: Possible large memory usage for wrong image dimensions

Severity

medium

EPSS

0.5% (p44)

CWE

CWE-789

Also known as

GHSA-5qjq-93h5-hrgp

Published

2026-07-23

Updated

2026-07-23

Advisory details

Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires loading images where the declared size values are much too large compared to the actual data.

Patches

This has been fixed in pypdf==6.14.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3888.

References

• https://github.com/advisories/GHSA-5qjq-93h5-hrgp
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-5qjq-93h5-hrgp
• https://nvd.nist.gov/vuln/detail/CVE-2026-59938
• https://github.com/py-pdf/pypdf/pull/3888
• https://github.com/py-pdf/pypdf/commit/c64583be16b8e8763d8777075f8ecbf382014b7a
• https://github.com/py-pdf/pypdf/releases/tag/6.14.0

Related advisories

• CVE-2026-115572 — high · PyPI/pypdf
• CVE-2026-115585 — high · PyPI/pypdf
• CVE-2026-115580 — high · PyPI/pypdf
• CVE-2026-102999 — high · PyPI/pypdf
• CVE-2026-102998 — high · PyPI/pypdf
• CVE-2026-103000 — high · PyPI/pypdf
• CVE-2026-102997 — high · PyPI/pypdf
• CVE-2026-102996 — high · PyPI/pypdf

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