{"id":"CVE-2026-110600","title":"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","summary":"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…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T21:17:35.453","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110600","references":[{"url":"https://github.com/brechtsanders/xlsxio/blob/0.2.37/lib/xlsxio_read.c#L851-L866","label":"disclosure@vulncheck.com"},{"url":"https://github.com/brechtsanders/xlsxio/issues/151","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/xlsxio-through-0.2.37-null-pointer-dereference-via-worksheet-relationship-without-id","label":"disclosure@vulncheck.com"},{"url":"https://github.com/brechtsanders/xlsxio/issues/151","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"ingestedAt":"2026-10-14T15:36:14.002Z","slug":"CVE-2026-110600","body":"## Overview\n\nxlsxio 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}