Is CVE-2026-110600 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-110600?

CVE-2026-110600 has a CVSS v3 severity of MEDIUM (5.5).

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CVE-2026-110600

Description

xlsxio through 0.2.37 contains a NULL pointer dereference vulnerability in main_sheet_get_sheetfile_expat_callback_element_start() in lib/xlsxio_read.c that allows attackers to crash applications via crafted files. Attackers can supply a .xlsx file whose workbook.xml.rels contains a worksheet Relationship lacking an Id attribute, crashing the process when xlsxioread_sheet_open() is called.