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-2026-28804 Details

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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/648c627d2657447dfb1773412af05a0a5103b98f [email protected]Patch
https://github.com/py-pdf/pypdf/pull/3666 [email protected]Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.7.5 [email protected]ProductRelease Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852 [email protected]PatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-407Inefficient Algorithmic Complexity[email protected]

Affected Products

ProductVersions
pypdf project pypdf
< 6.7.5

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-2026-28804
NVD Published Date:
Mar 6, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-28804 Details - Not Deferred