Is CVE-2026-111126 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-111126?

CVE-2026-111126 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-111126

Description

catdoc through 0.95 contains an out-of-bounds read vulnerability in the MULRK record handler of process_item() in src/xlsparse.c that allows attackers to read past the static rec buffer via a crafted end column. Attackers can supply a crafted .xls workbook or BIFF stream with a large endcol to xls2csv to disclose adjacent process memory as CSV cells or crash the process.