CVE-2026-113795

pypdf: Possible large memory usage for streams with multiple filters

State: Published
Severity: 6.0 Medium
Published: Oct 21, 2026
Updated: Oct 30, 2026
Reserved: Oct 20, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.0 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-400 Uncontrolled Resource Consumption
CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
pypdfpy-pdf	< 6.20.0Affected

References

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