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.
Published: 2026-10-21
Score: 6 Medium
EPSS: n/a
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No solution or workaround provided in the CVE record.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Github GHSA Github GHSA GHSA-39mj-jf6j-2qj3 pypdf: Possible infinite loop when hitting EOF in standard xref table
History

Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
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.
Title pypdf: Possible infinite loop when hitting EOF in standard xref table
Weaknesses CWE-835
References
Metrics cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-21T15:59:26.054Z

Reserved: 2026-10-20T17:39:41.373Z

Link: CVE-2026-113794

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-21T16:17:28.707

Modified: 2026-10-21T16:17:28.707

Link: CVE-2026-113794

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-835

    Loop with Unreachable Exit Condition ('Infinite Loop')