CVE Feed

    Dashboard / CVE / CVE-2026-33123

    CVE-2026-33123

    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.

    Published:Mar 20, 2026
    Last Modified:Mar 25, 2026
    EPS:Mar 20, 2026
    EPSS Score:0.00008
    CVSS Score:6.5

    Affected Products

    Vendor
    Py-pdf
    Product
    Pypdf
    Vendor
    Pypdf Project
    Product
    Pypdf

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-84311 (CVSS 4.8) — pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that cau…
    CVE-2026-84310 (CVSS 4.8) — pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that cau…
    CVE-2026-84309 (CVSS 6.9) — pypdf is a free and open-source pure-python PDF library. Prior to 6.16.0, an attacker can craft a PDF whose cy…
    CVE-2026-82398 (CVSS 6.9) — pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, an attacker can craft a PDF that cau…
    CVE-2026-71870 (CVSS 4.8) — pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory…
    CVE-2026-71852 (CVSS 4.8) — pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause long runtime…
    CVE-2026-59936 (CVSS 8.7) — pypdf is a free and open-source pure-python PDF library. Prior to 6.14.1, an attacker can craft a PDF with a p…
    CVE-2026-59935 (CVSS 8.7) — pypdf is a free and open-source pure-python PDF library. Prior to 6.14.2, an attacker can craft a PDF with a p…
    CVE-2026-59937 (CVSS 6.9) — pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with rep…
    CVE-2026-59938 (CVSS 6.9) — pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with dec…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High