pypdf: Possible large memory usage for large offsets for layout mode text

GHSA-cj93-chg6-vgv8 · CVE-2026-48155 · PYSEC-2026-3016

Published Jun 12, 2026 · Modified Sep 10, 2026

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Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets.

Patches

This has been fixed in pypdf==6.12.0.

Workarounds

If developers are unable to immediately upgrade, they should consider applying the changes from PR #3790.

References

WEB https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-48155
WEB https://github.com/py-pdf/pypdf/pull/3790
PACKAGE https://github.com/py-pdf/pypdf
WEB https://github.com/py-pdf/pypdf/releases/tag/6.12.0

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