CVE-2026-41313

Name: CVE-2026-41313
Creator: NVD / NIST
Published: 2026-04-22T22:16:32.22+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.21%

Last modified Jun 17, 2026

CVE-2026-41313 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.

Metrics

CVSS 3.1

6.5/10

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

CVSS 4.0

4.8/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.21%

11.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-834

Affected Software

Vendor	Product	Versions
Pypdf Project	Pypdf	< 6.10.2

References

https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88aPatch
https://github.com/py-pdf/pypdf/pull/3735Issue Tracking, Patch
https://github.com/py-pdf/pypdf/releases/tag/6.10.2Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcwPatch, Vendor Advisory

Timeline

Published: Apr 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-41313?

How severe is CVE-2026-41313?

CVE-2026-41313 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.

How do I fix CVE-2026-41313?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-41313?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST