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    CVE-2026-119203

    pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop while opening a crafted incomplete PDF whose standard cross-reference table reaches the end of the file without a trailer. The trailer search can repeatedly rewind to the same stream position instead of terminating when parsing makes no progress, blocking the processing thread. This issue is fixed in version 6.21.4.

    Published:Oct 29, 2026
    Last Modified:Oct 30, 2026
    EPS:Oct 29, 2026
    EPSS Score:0.00304
    CVSS Score:5.5

    Affected Products

    Vendor
    Py-pdf
    Product
    Pypdf

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-119209 (CVSS 7.1) — pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory w…
    CVE-2026-119208 (CVSS 7.1) — pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive time and…
    CVE-2026-119207 (CVSS 7.1) — pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory w…
    CVE-2026-119206 (CVSS 7.1) — pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to ret…
    CVE-2026-119205 (CVSS 7.1) — pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop whe…
    CVE-2026-119204 (CVSS 7.1) — pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory w…
    CVE-2026-115585 (CVSS 7.1) — pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeat…
    CVE-2026-115580 (CVSS 7.1) — pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a s…
    CVE-2026-115572 (CVSS 7.1) — pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF that rep…
    CVE-2026-113795 (CVSS 6) — pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, accessing a crafted PDF stream with …

    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