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VULNERABILITIES

CVE-2026-59937 Details

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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/b5fc5aa714f4b696fb9b1deaa35a9e4a4eb50dae [email protected]Patch
https://github.com/py-pdf/pypdf/pull/3887 [email protected]Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.14.0 [email protected]ProductRelease Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-55h5-xmcq-c37v [email protected]PatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource Consumption[email protected]

Affected Products

ProductVersions
pypdf project pypdf
< 6.14.0

CPE

  • cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-59937
NVD Published Date:
Jul 8, 2026
NVD Last Modified:
Jul 9, 2026
Source:
[email protected]
CVE-2026-59937 Details - Not Deferred