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Vulnerability record · CVE-2026-102994 · published 30 September 2026

CVE-2026-102994: Pypdf project pypdf uncontrolled resource consumption vulnerability

PPypdf Project · Pypdf

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that continue for a long time without whitespace can cause pypdf/_reader.py and pypdf/generic/_base.py to scan excessive input through read_until_whitespace, resulting in long runtimes and application unavailability. This issue is fixed in version 6.18.0.

8.7 CVSS 4.0 High EPSS 0.35% · top 74.1% CWE-400 · Uncontrolled resource consumptionCWE-407 · CWE-407
8.7CVSS 4.0 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
5 Oct 2026Last modified by NVD

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that continue for a long time without whitespace can cause pypdf/_reader.py and pypdf/generic/_base.py to scan excessive input through read_until_whitespace, resulting in long runtimes and application unavailability. This issue is fixed in version 6.18.0.

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/82501d2993c6387833c4949d205caeb188f8bb9e Patch
https://github.com/py-pdf/pypdf/pull/4055 PatchIssue Tracking
https://github.com/py-pdf/pypdf/releases/tag/6.18.0 Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-5jq2-8x83-x246 Vendor 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-2026-102994), CISA KEV, FIRST EPSS (scores of 2026-10-07). This page is refreshed as NVD updates the record.