CVE-2026-41168

medium

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.

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx

https://github.com/py-pdf/pypdf/releases/tag/6.10.1

https://github.com/py-pdf/pypdf/pull/3733

https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3

Details

Source: Mitre, NVD

Published: 2026-04-22

Updated: 2026-04-24

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Severity: Medium

CVSS v4

Base Score: 6.9

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00042