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    CVE-2026-40260

    pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has been fixed in version 6.10.0.

    Published:Apr 16, 2026
    Last Modified:Apr 22, 2026
    EPS:Apr 16, 2026
    EPSS Score:0.00021
    CVSS Score:5.3

    Affected Products

    Vendor
    Py-pdf
    Product
    Pypdf
    Vendor
    Pypdf Project
    Product
    Pypdf

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-197 Exponential Data Expansion

    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