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CVE-2026-84311 Details

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_page.py PageObject._extract_text and PageObject.extract_xform_text to traverse a directed acyclic graph of reused form XObjects in which each form invokes a child multiple times, creating exponentially many traversal paths and causing long runtimes and large memory consumption. This issue is fixed in version 6.16.1.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/py-pdf/pypdf/commit/d91ab705fd81ed1a9cec175c6958600dea1a4942	[email protected]
https://github.com/py-pdf/pypdf/pull/3966	[email protected]
https://github.com/py-pdf/pypdf/releases/tag/6.16.1	[email protected]
https://github.com/py-pdf/pypdf/security/advisories/GHSA-763m-79hh-57f2	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-834	Excessive Iteration	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 2, 2026	CVE Modified	CISA-ADP
Sep 1, 2026	New CVE Received	[email protected]