{"id":"CVE-2026-110600","published":"2026-10-14T15:17:11.387","lastModified":"2026-10-15T14:47:05.720","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.","cvssScore":5.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwes":["CWE-476"],"vendors":[],"products":[],"references":[{"url":"https://github.com/brechtsanders/xlsxio/blob/0.2.37/lib/xlsxio_read.c#L851-L866","tags":[]},{"url":"https://github.com/brechtsanders/xlsxio/issues/151","tags":[]},{"url":"https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref","tags":[]},{"url":"https://www.vulncheck.com/advisories/xlsxio-through-0.2.37-null-pointer-dereference-via-worksheet-relationship-without-id","tags":[]},{"url":"https://github.com/brechtsanders/xlsxio/issues/151","tags":[]},{"url":"https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref","tags":[]}],"exploitRefs":[{"url":"https://github.com/brechtsanders/xlsxio/blob/0.2.37/lib/xlsxio_read.c#L851-L866","tags":[]},{"url":"https://github.com/brechtsanders/xlsxio/issues/151","tags":[]},{"url":"https://github.com/brechtsanders/xlsxio/issues/151","tags":[]}],"hasPoc":true,"ai":null}