{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-110600", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-14T13:07:20.207Z", "datePublished": "2026-10-14T14:16:42.374Z", "dateUpdated": "2026-10-14T14:16:42.374Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-14T14:16:42.374Z"}, "datePublic": "2026-09-20T00:00:00.000Z", "title": "xlsxio through 0.2.37 NULL Pointer Dereference via Worksheet Relationship Without Id", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "NULL Pointer Dereference", "cweId": "CWE-476", "type": "CWE"}]}], "affected": [{"vendor": "brechtsanders", "product": "xlsxio", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThanOrEqual": "0.2.37", "status": "affected", "versionType": "semver"}], "packageURL": "pkg:github/brechtsanders/xlsxio", "collectionURL": "https://github.com", "repo": "https://github.com/brechtsanders/xlsxio"}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:xlsxio_project:xlsxio:*:*:*:*:*:*:*:*", "versionEndIncluding": "0.2.37"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/brechtsanders/xlsxio/issues/151", "tags": ["issue-tracking"]}, {"url": "https://github.com/brechtsanders/xlsxio/blob/0.2.37/lib/xlsxio_read.c#L851-L866", "tags": ["technical-description"]}, {"url": "https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref", "tags": ["third-party-advisory"]}, {"name": "VulnCheck Advisory: xlsxio through 0.2.37 NULL Pointer Dereference via Worksheet Relationship Without Id", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/xlsxio-through-0.2.37-null-pointer-dereference-via-worksheet-relationship-without-id"}], "credits": [{"lang": "en", "value": "pedrobtz", "type": "finder"}, {"lang": "en", "value": "HaiND from the Post and Telecommunication Institute of Technology", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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