CVE-2026-59936

pypdf: Possible infinite loop for not terminated inline images

State: Published
Severity: 8.7 High
Published: Jul 8, 2026
Updated: Jul 9, 2026
Reserved: Jul 7, 2026

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.1, an attacker can craft a PDF with a page content stream containing a not terminated inline image, causing an infinite loop during inline image end marker detection such as when extracting page text. This issue is fixed in version 6.14.1.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
pypdfpy-pdf	< 6.14.1Affected

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-5xf7-4p34-54qr
https://github.com/py-pdf/pypdf/pull/3891
https://github.com/py-pdf/pypdf/commit/ec3b14596186c40caca7cf8ab9b2155203e01b5b
https://github.com/py-pdf/pypdf/releases/tag/6.14.1

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