CVE-2026-41168

5.3 MEDIUM
Published: April 22, 2026 Modified: April 24, 2026
View on NVD

Description

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/py-pdf/pypdf/pull/3733
Source: security-advisories@github.com
Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.10.1
Source: security-advisories@github.com
Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx
Source: security-advisories@github.com
Mitigation Patch Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.0%
15th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

pypdf_project