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.

Risk Information

Base Score

6.5

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Score

Exploitation Probability

0.008

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2026-33123 are fixed in Python-pypdf 6.9.1	Windows
Vulnerabilities CVE-2026-33123 are fixed in Python-pypdf for linux 6.9.1	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234