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VULNERABILITIES

CVE-2026-113793 Details

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, removing an object from a crafted cyclic PDF tree, such as an outline item, can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0 [email protected]Patch
https://github.com/py-pdf/pypdf/pull/4188 [email protected]Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.20.1 [email protected]Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mx8-4j7g-633p [email protected]Vendor AdvisoryPatch

Weakness Enumeration

CWE-IDCWE NameSource
CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')[email protected]

Affected Products

ProductVersions
py-pdf pypdf
< 6.20.1

CPE

  • cpe:2.3:a:py-pdf:pypdf:*:*:*:*:*:python:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-113793
NVD Published Date:
Oct 21, 2026
NVD Last Modified:
Nov 5, 2026
Source:
[email protected]
CVE-2026-113793 Details - Not Deferred