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    CVE-2026-63275

    LibreOffice can read CFF fonts, which may be embedded in documents. A stack buffer overflow existed when reading the hints of a glyph. The number of hints was checked against the wrong bound, so a glyph declaring more hints than the array can hold wrote past its end. In fixed versions the hint count is checked against the capacity the array really has.

    Published:Sep 22, 2026
    Last Modified:Sep 22, 2026
    EPS:Sep 22, 2026
    EPSS Score:
    CVSS Score:5.4

    Affected Products

    Vendor
    The Document Foundation
    Product
    Libreoffice

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    CVE-2026-63277 (CVSS 8.5) — LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A do…
    CVE-2026-63279 (CVSS 5.4) — LibreOffice can import PICT images, which may be embedded in documents. An out of bounds read existed when imp…
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    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