Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.
VOLERION
Volerion Security Research

NOT DEFERRED DATABASE

VULNERABILITIES

CVE-2026-113791 Details

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing a content stream with many small operations, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:3.3 LOWVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12 [email protected]Patch
https://github.com/py-pdf/pypdf/pull/4218 [email protected]Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.21.0 [email protected]Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77c [email protected]Vendor AdvisoryPatch

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource Consumption[email protected]
CWE-770Allocation of Resources Without Limits or Throttling[email protected]

Affected Products

ProductVersions
py-pdf pypdf
< 6.21.0

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-2026-113791
NVD Published Date:
Oct 21, 2026
NVD Last Modified:
Nov 5, 2026
Source:
[email protected]
CVE-2026-113791 Details - Not Deferred