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Vulnerability record · CVE-2026-59938 · published 8 July 2026

CVE-2026-59938: Pypdf project pypdf vulnerability

PPypdf Project · Pypdf

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.

6.9 CVSS 4.0 Medium EPSS 0.52% · top 58.5% CWE-789 · CWE-789
6.9CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
9 Jul 2026Last modified by NVD

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.

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/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/py-pdf/pypdf/commit/c64583be16b8e8763d8777075f8ecbf382014b7a Patch
https://github.com/py-pdf/pypdf/pull/3888 Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.14.0 ProductRelease Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-5qjq-93h5-hrgp PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-59938), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.