pypdf: Manipulated XMP metadata streams can exhaust RAM

GHSA-wjqc-6w8f-h24c · CVE-2026-48735

Published Jun 16, 2026 · Modified Jun 16, 2026

Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements.

Patches

This has been fixed in pypdf==6.12.1.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3796.

References

WEB https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjqc-6w8f-h24c
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-48735
WEB https://github.com/py-pdf/pypdf/pull/3796
PACKAGE https://github.com/py-pdf/pypdf
WEB https://github.com/py-pdf/pypdf/releases/tag/6.12.1

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