CVE-2026-54530

pypdf: Possible infinite loop when retrieving fonts for layout-mode text extraction

State: Published
Severity: 6.9 Medium
Published: Jun 22, 2026
Updated: Jun 23, 2026
Reserved: Jun 15, 2026

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.13.0, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires extracting the text in layout mode. This vulnerability is fixed in 6.13.0.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	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	GitHub_M

Weaknesses

CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

Affected Products

Product	Versions
pypdfpy-pdf	< 6.13.0Affected

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-52x6-gq3r-vpf4
https://github.com/py-pdf/pypdf/pull/3830
https://github.com/py-pdf/pypdf/releases/tag/6.13.0

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