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    CVE-2025-66019

    pypdf is a free and open-source pure-python PDF library. Prior to version 6.4.0, an attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patched in version 6.4.0.

    Published:Nov 25, 2025
    Last Modified:Apr 15, 2026
    EPS:Nov 25, 2025
    EPSS Score:0.00094
    CVSS Score:5.3

    Affected Products

    Vendor
    Pypdf Project
    Product
    Pypdf

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-41312 (CVSS 4.8) — pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versi…
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    Common Vulnerability Scoring System

    Attack Vector
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    User Interaction
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    Integrity
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