| Name | CVE-2026-33123 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1131479 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| pypdf (PTS) | bookworm | 3.4.1-1+deb12u1 | vulnerable |
| trixie | 5.4.0-1 | vulnerable |
| forky, sid | 6.9.2-1 | fixed |
| pypdf2 (PTS) | bullseye | 1.26.0-4+deb11u1 | vulnerable |
| bookworm | 2.12.1-3+deb12u1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| pypdf | source | (unstable) | 6.9.2-1 | | | 1131479 |
| pypdf2 | source | (unstable) | (unfixed) | | | |
Notes
[trixie] - pypdf <no-dsa> (Minor issue)
[bookworm] - pypdf <no-dsa> (Minor issue)
[bookworm] - pypdf2 <no-dsa> (Minor issue)
https://github.com/py-pdf/pypdf/security/advisories/GHSA-qpxp-75px-xjcp
https://github.com/py-pdf/pypdf/pull/3686
Fixed by: https://github.com/py-pdf/pypdf/commit/0b5d05de59a055c132b435ee2375bc32ff04d48e (6.9.1)