CVE-2026-48155

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

State: Published
Severity: 4.8 Medium
Published: May 28, 2026
Updated: May 28, 2026
Reserved: May 20, 2026

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, 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. This vulnerability is fixed in 6.12.0.

Scores

CVSS	Score	Vector	Source
4.0	4.8 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
pypdfpy-pdf	< 6.12.0Affected

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8
https://github.com/py-pdf/pypdf/pull/3790
https://github.com/py-pdf/pypdf/releases/tag/6.12.0

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