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Vulnerability record · CVE-2026-59936 · published 8 July 2026

CVE-2026-59936: Pypdf project pypdf uncontrolled resource consumption vulnerability

PPypdf Project · Pypdf

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.1, an attacker can craft a PDF with a page content stream containing a not terminated inline image, causing an infinite loop during inline image end marker detection such as when extracting page text. This issue is fixed in version 6.14.1.

8.7 CVSS 4.0 High EPSS 0.62% · top 52.4% CWE-400 · Uncontrolled resource consumption
8.7CVSS 4.0 base score
0.62%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 6.14.1, an attacker can craft a PDF with a page content stream containing a not terminated inline image, causing an infinite loop during inline image end marker detection such as when extracting page text. This issue is fixed in version 6.14.1.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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/ec3b14596186c40caca7cf8ab9b2155203e01b5b Patch
https://github.com/py-pdf/pypdf/pull/3891 Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.14.1 ProductRelease Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-5xf7-4p34-54qr 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-2026-59936), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.