CVE-2026-113795

Medium

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, accessing a crafted PDF stream with a large number of filters or multiple filters that pass around large amounts of data can cause large memory consumption. This issue is fixed in version 6.20.0.

SeverityMedium

CVSS6.0

Exploit probability—

ProductPypdf

PublishedOct 21, 2026

First seenOct 21, 2026

Weakness typeCWE-400Uncontrolled resource consumption CWE-770Allocation of resources without limits

How to fix

Update

pypdf6.20.0 or later
py-pdf pypdf6.20.0 or later

Affected products

Product	Affected versions	Fixed in
pypdfPyPI	v < 6.20.0	6.20.0
py-pdf pypdf	v < 6.20.0	6.20.0

Check your version

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