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    CVE-2026-111127

    catdoc through 0.95 contains an out-of-bounds read vulnerability in copy_unicode_string() in src/xlsparse.c that allows attackers to read past buffers via an unchecked string character count. Attackers can supply a crafted .xls file declaring 0xFFFF two-byte characters in LABEL, STRING, or SST records to disclose adjacent memory through xls2csv output or crash the process.

    Published:Oct 15, 2026
    Last Modified:Oct 16, 2026
    EPS:Oct 15, 2026
    EPSS Score:0.00129
    CVSS Score:6.1

    Affected Products

    Vendor
    Fossies
    Product
    Catdoc

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2026-111126 (CVSS 6.9) — catdoc through 0.95 contains an out-of-bounds read vulnerability in the MULRK record handler of process_item()…
    CVE-2024-52035 (CVSS 8.4) — An integer overflow vulnerability exists in the OLE Document File Allocation Table Parser functionality of cat…
    CVE-2024-54028 (CVSS 8.4) — An integer underflow vulnerability exists in the OLE Document DIFAT Parser functionality of catdoc 0.95. A spe…
    CVE-2023-46345 (CVSS 7.5) — Catdoc v0.95 was discovered to contain a NULL pointer dereference via the component xls2csv at src/xlsparse.c.…
    CVE-2023-41633 (CVSS 5.5) — Catdoc v0.95 was discovered to contain a NULL pointer dereference via the component xls2csv at src/fileutil.c.…
    CVE-2023-31979 (CVSS 7.8) — Catdoc v0.95 was discovered to contain a global buffer overflow via the function process_file at /src/reader.c…
    CVE-2017-11110 (CVSS 7.8) — The ole_init function in ole.c in catdoc 0.95 allows remote attackers to cause a denial of service (heap-based…

    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