CVE catalog

CVE-2026-33123

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: Mar 18, 2026, 4:17:31 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.36% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	pypdf	sid	`6.21.1-1`	fixed
Debian	pypdf	forky	`6.21.1-1`	fixed
Debian	pypdf	trixie	`5.4.0-1`	vulnerable
Debian	pypdf	bookworm	`3.4.1-1+deb12u1`	vulnerable
Debian	pypdf2	bookworm	`2.12.1-3+deb12u1`	vulnerable
Pip	pypdf	Not reported	`6.9.1`	fixed
Cpe	pypdf	Not reported	Not reported	vulnerable
Cpe	pypdf2	Not reported	Not reported	vulnerable
PyPI	pypdf	Not reported	`6.9.1`	fixed
Opensuse	python-PyPDF2	tumbleweed	`2.11.1-8.1`	fixed
Opensuse	python-pypdf	tumbleweed	`6.9.1-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	pypdf	source	sid	`6.9.2-1`	not yet assigned	Not reported	[1131479]
Debian	pypdf	source	forky	`6.9.2-1`	not yet assigned	Not reported	[1131479]
Debian	pypdf	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1131479]
Debian	pypdf	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1131479]
Debian	pypdf2	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Pip	pypdf	pip	Not reported	`6.9.1`	Not reported	Not reported	Not reported
PyPI	pypdf	PyPI	Not reported	`6.9.1`	Not reported	GHSA-QPXP-75PX-XJCP	Not reported
Opensuse	python-PyPDF2	rpm	tumbleweed	`2.11.1-8.1`	Not reported	OPENSUSE-SU-2026:10402-1	Not reported
Opensuse	python-pypdf	rpm	tumbleweed	`6.9.1-1.1`	Not reported	OPENSUSE-SU-2026:10403-1	Not reported

[Debian bug #1131479]

Notes

[trixie] pypdf: Minor issue [bookworm] pypdf: Minor issue [bookworm] pypdf2: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-pypdf]Affected
Source package: [pypdf]
Details (2)
- 3.4.1-1+deb12u1 · all · bookworm
  Affected
  nvd · pypdf · debian · bookworm; nvd · pypdf · debian · 12
- 3.4.1-1+deb12u1 · all · bookworm
  Affected
  nvd · pypdf · debian · bookworm; nvd · pypdf · debian · 12
[python3-pypdf2]Affected
Source package: [pypdf2]
Details (2)
- 2.12.1-3+deb12u1 · all · bookworm
  Affected
  nvd · pypdf2 · debian · bookworm; nvd · pypdf2 · debian · 12
- 2.12.1-3+deb12u1 · all · bookworm
  Affected
  nvd · pypdf2 · debian · bookworm; nvd · pypdf2 · debian · 12

[Debian 13 (Trixie)]

[python3-pypdf]Affected
Source package: [pypdf]
Details (2)
- 5.4.0-1 · all · trixie
  Affected
  nvd · pypdf · debian · 13
- 5.4.0-1 · all · trixie
  Affected
  nvd · pypdf · debian · 13

[openSUSE Tumbleweed]

[python313-pypdf]Unknown
Source package: [python-pypdf]
Details (1)
- 6.16.2-1.1 · noarch · tumbleweed
  Unknown · Fixed: 6.9.1-1.1
  Version impact unknown
  nvd · python-pypdf · opensuse · tumbleweed
[python314-pypdf]Unknown
Source package: [python-pypdf]
Details (1)
- 6.16.2-1.1 · noarch · tumbleweed
  Unknown · Fixed: 6.9.1-1.1
  Version impact unknown
  nvd · python-pypdf · opensuse · tumbleweed

Observed: Oct 23, 2026, 10:41:26 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]