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VULNERABILITIES

CVE-2026-48156 Details

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with /W [0 0 0] values and large /Size values. This vulnerability is fixed in 6.12.0.

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

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URLSource(s)Tag(s)
https://github.com/py-pdf/pypdf/pull/3791 [email protected]Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.12.0 [email protected]Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-248m-82v9-q6g6 [email protected]PatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-834Excessive Iteration[email protected]

Affected Products

ProductVersions
pypdf project pypdf
< 6.12.0

CPE

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

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-48156
NVD Published Date:
May 28, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-48156 Details - Not Deferred