CVE-2026-28804

5.3 MEDIUM
Published: March 06, 2026 Modified: March 10, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
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

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f
Source: security-advisories@github.com
Patch
https://github.com/py-pdf/pypdf/pull/3666
Source: security-advisories@github.com
Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.7.5
Source: security-advisories@github.com
Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852
Source: security-advisories@github.com
Patch Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.0%
14th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-407

Affected Vendors

pypdf_project

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