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.
Published: 2026-09-30
Score: 8.7 High
EPSS: n/a
KEV: No
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Remediation

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Tracking

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Advisories

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History

Wed, 30 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
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.
Title pypdf: Possible long runtimes/large memory usage when parsing indirect objects
Weaknesses CWE-400
CWE-407
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-30T20:50:16.366Z

Reserved: 2026-09-29T20:46:08.334Z

Link: CVE-2026-102994

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-30T20:17:28.080

Modified: 2026-09-30T20:17:28.080

Link: CVE-2026-102994

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption

  • CWE-407

    Inefficient Algorithmic Complexity