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VULNERABILITIES

CVE-2026-113794 Details

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, an attacker can craft an incomplete PDF that ends inside a standard cross-reference table, causing pypdf to mishandle the unexpected end of file and enter an infinite loop. This issue is fixed in version 6.20.0.

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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URLSource(s)Tag(s)
https://github.com/py-pdf/pypdf/commit/37e1cd681744bac38b159f7e1c614eee8d639c58 [email protected]Patch
https://github.com/py-pdf/pypdf/issues/4169 [email protected]Issue TrackingPatch
https://github.com/py-pdf/pypdf/pull/4170 [email protected]Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.20.0 [email protected]Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-39mj-jf6j-2qj3 [email protected]Vendor Advisory

Weakness Enumeration

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

Affected Products

ProductVersions
py-pdf pypdf
< 6.20.0

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-2026-113794
NVD Published Date:
Oct 21, 2026
NVD Last Modified:
Nov 2, 2026
Source:
[email protected]
CVE-2026-113794 Details - Not Deferred