CVE-2026-84311

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/py-pdf/pypdf/commit/d91ab705fd81ed1a9cec175c6958600dea1a4942
https://github.com/py-pdf/pypdf/pull/3966
https://github.com/py-pdf/pypdf/releases/tag/6.16.1
https://github.com/py-pdf/pypdf/security/advisories/GHSA-763m-79hh-57f2

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-01 21:18

Updated : 2026-09-09 16:49

NVD link : CVE-2026-84311

Mitre link : CVE-2026-84311

CVE.ORG link : CVE-2026-84311

JSON object : View

Products Affected

No product.

CWE

CWE-834

Excessive Iteration

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