Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2.
Published: 2026-10-23
Score: 7.1 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-gmh7-3g9r-mjh5 pypdf: Possible long runtimes for large xref table header limits
History

Fri, 23 Oct 2026 19:45:00 +0000

Type Values Removed Values Added
Description pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2.
Title pypdf: Possible long runtimes for large xref table header limits
Weaknesses CWE-834
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-23T19:29:49.845Z

Reserved: 2026-10-22T22:53:15.238Z

Link: CVE-2026-115580

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-23T20:17:21.087

Modified: 2026-10-23T20:17:21.087

Link: CVE-2026-115580

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T21:00:08Z

Weaknesses