PT-2026-21301 · Pypi+1 · Pypdf+1

Cheonwoong-Park · Published 2026-02-18 · Updated 2026-05-21 · CVE-2026-27024

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.7.1

Description A crafted PDF file can cause an infinite loop when accessing the children of a TreeObject, such as during outline processing. This issue affects the pypdf library, a free and open-source pure-python PDF library.

Recommendations Update to version 6.7.1 or later.

Exploit

Fix

DoS

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

BDU:2026-07257

CVE-2026-27024

GHSA-996Q-PR4M-CVGQ

OPENSUSE-SU-2026:10238-1

OPENSUSE-SU-2026:10277-1

OPENSUSE-SU-2026:20333-1

Affected Products

Red Os

Pypdf

References · 38

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27024.json · Exploit
• https://github.com/py-pdf/pypdf/pull/3645 · Patch
• https://github.com/py-pdf/pypdf/commit/bd2f6d052fe5941e85e37082c2a43453d48d1295 · Patch
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-996q-pr4m-cvgq · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-996q-pr4m-cvgq · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-27024 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:20333-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-27024 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07257 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-27024 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-27024 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10277-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-APP-PYPI-CVE-2026-27024 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10238-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27024 · Security Note