PT-2026-23002 · Pypi+1 · Pypdf+1

Kule500 · CVE-2026-28804 · Published 2026-03-02 · Updated 2026-07-13

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.7.5

Description A crafted PDF file can cause excessive processing time when accessing a stream that utilizes the /ASCIIHexDecode filter. This issue affects the pypdf library.

Recommendations Update to version 6.7.5 or later.

Exploit

Fix

DoS

Weakness Enumeration

CWE-407

Related Identifiers

BDU:2026-07225

CVE-2026-28804

GHSA-9M86-7PMV-2852

OPENSUSE-SU-2026:10321-1

OPENSUSE-SU-2026:20348-1

PYSEC-2026-3014

Affected Products

Red Os

Pypdf

References · 28

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28804.json · Exploit
• https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f · Patch
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852 · Vendor Advisory
• https://github.com/py-pdf/pypdf/pull/3666 · Patch
• https://osv.dev/vulnerability/CVE-2026-28804 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2026-3014 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-28804 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-28804 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-28804 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-APP-PYPI-CVE-2026-28804 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-9m86-7pmv-2852 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-28804 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-28804 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07225 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-28804 · Security Note