CVE-2026-33123

EUVD-2026-13651
pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.1 allow an attacker to craft a malicious PDF which leads to long runtimes and/or large memory usage. Exploitation requires accessing an array-based stream with many entries. This issue has been fixed in version 6.9.1.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
pypdf_projectpypdf
𝑥
< 6.9.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
pypdf
bookworm
vulnerable
forky
vulnerable
sid
6.9.2-1
fixed
trixie
vulnerable
pypdf2
bookworm
vulnerable
bullseye
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
pypdf
jammy
dne
noble
needs-triage
questing
needs-triage
Common Weakness Enumeration
References
https://github.com/py-pdf/pypdf/pull/3686
https://github.com/py-pdf/pypdf/releases/tag/6.9.1
https://github.com/py-pdf/pypdf/security/advisories/GHSA-qpxp-75px-xjcp