{"id":"CVE-2026-110600","revision":"984cebefc57140aaaf7e2f624b8eb51d","records":[{"revision":"984cebefc57140aaaf7e2f624b8eb51d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-110600","aliases":[],"title":"xlsxio through 0.2.37 NULL Pointer Dereference via Worksheet Relationship Without Id","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.","state":0,"publishedAt":"2026-10-14T14:16:42.374+00:00","modifiedAt":"2026-10-14T20:43:54.196+00:00","affected":[{"ecosystem":"https://github.com","name":"xlsxio","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"brechtsanders\",\n                    \"product\": \"xlsxio\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"0.2.37\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:github/brechtsanders/xlsxio\",\n                    \"collectionURL\": \"https://github.com\",\n                    \"repo\": \"https://github.com/brechtsanders/xlsxio\"\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":6.8,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":5.5,"severity":"MEDIUM"}],"references":["https://github.com/brechtsanders/xlsxio/issues/151","https://github.com/brechtsanders/xlsxio/blob/0.2.37/lib/xlsxio_read.c#L851-L866","https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref","https://www.vulncheck.com/advisories/xlsxio-through-0.2.37-null-pointer-dereference-via-worksheet-relationship-without-id"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110600","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-110600","identifiers":["CVE-2026-110600"]},"retained":false,"historicalAffected":[]}],"coverage":[]}