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Vulnerability record · CVE-2026-102993 · published 30 September 2026

CVE-2026-102993: Pypdf project pypdf uncontrolled resource consumption vulnerability

PPypdf Project · Pypdf

pypdf is a free and open-source pure-python PDF library. Prior to 6.17.0, a crafted PDF can provide unusually large Roman page-label values that cause pypdf/_page_labels.py to generate excessively large numeral strings when an application retrieves document page labels, consuming large amounts of memory and potentially making the application unavailable. This issue is fixed in version 6.17.0.

8.7 CVSS 4.0 High EPSS 0.35% · top 72.9% CWE-400 · Uncontrolled resource consumptionCWE-770 · Allocation without limits
8.7CVSS 4.0 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
2 Oct 2026Last modified by NVD

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.17.0, a crafted PDF can provide unusually large Roman page-label values that cause pypdf/_page_labels.py to generate excessively large numeral strings when an application retrieves document page labels, consuming large amounts of memory and potentially making the application unavailable. This issue is fixed in version 6.17.0.

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/89db7c4fe9315ecc964bfdf05a4e8c4b94175163 Patch
https://github.com/py-pdf/pypdf/pull/4047 Patch
https://github.com/py-pdf/pypdf/releases/tag/6.17.0 Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-qv6h-rv94-w285 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-2026-102993), CISA KEV, FIRST EPSS (scores of 2026-10-16). This page is refreshed as NVD updates the record.