{"id":"CVE-2026-110600","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-110600","generatedAt":"2026-10-28T03:59:09.882Z","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.","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.","published":"2026-10-14T15:17:11.000Z","lastModified":"2026-10-15T14:47:06.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":6.8,"severity":"MEDIUM","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-476"],"affected":[],"epss":{"score":0.00237,"percentile":0.14657,"date":"2026-10-27","history":[{"date":"2026-10-15","score":0.00237,"percentile":0.13674}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-14T15:17:11.000Z","detail":{"score":"6.8","severity":"MEDIUM","publishedAt":"2026-10-14T15:17:11.387Z"},"summary":"New CVE, medium severity (CVSS 6.8)."}],"references":[{"url":"https://github.com/brechtsanders/xlsxio/blob/0.2.37/lib/xlsxio_read.c#L851-L866","source":"disclosure@vulncheck.com"},{"url":"https://github.com/brechtsanders/xlsxio/issues/151","source":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/xlsxio-through-0.2.37-null-pointer-dereference-via-worksheet-relationship-without-id","source":"disclosure@vulncheck.com"},{"url":"https://github.com/brechtsanders/xlsxio/issues/151","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-110600","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}