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CVE-2026-119206 Details

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ranges. The page_labels property resolves each page independently and repeatedly scans the same /Nums array from the beginning, causing work to grow with both the page count and the number of label ranges. This issue is fixed in version 6.21.3.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/py-pdf/pypdf/commit/b891fef37000cd86baa6e9848a3387d080b3b03e	[email protected]	Patch
https://github.com/py-pdf/pypdf/pull/4251	[email protected]	Patch
https://github.com/py-pdf/pypdf/releases/tag/6.21.3	[email protected]	Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-42gh-23hr-vphw	[email protected]	PatchVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-400	Uncontrolled Resource Consumption	[email protected]

Affected Products

Product	Versions
py-pdf pypdf	< 6.21.3
CPE cpe:2.3:a:py-pdf:pypdf:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Nov 3, 2026	CVE Modified	CISA-ADP
Nov 2, 2026	CPE Deprecation Remap	[email protected]
Nov 2, 2026	Initial Analysis	[email protected]
Oct 29, 2026	New CVE Received	[email protected]