{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-111127", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-15T17:03:51.865Z", "datePublished": "2026-10-15T18:57:23.479Z", "dateUpdated": "2026-10-15T18:57:23.479Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-15T18:57:23.479Z"}, "datePublic": "2026-10-15T00:00:00.000Z", "title": "catdoc through 0.95 Out-of-Bounds Read via xls2csv copy_unicode_string", "descriptions": [{"lang": "en", "value": "catdoc through 0.95 contains an out-of-bounds read vulnerability in copy_unicode_string() in src/xlsparse.c that allows attackers to read past buffers via an unchecked string character count. Attackers can supply a crafted .xls file declaring 0xFFFF two-byte characters in LABEL, STRING, or SST records to disclose adjacent memory through xls2csv output or crash the process."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Out-of-bounds Read", "cweId": "CWE-125", "type": "CWE"}]}], "affected": [{"vendor": "catdoc", "product": "catdoc", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThanOrEqual": "0.95", "status": "affected", "versionType": "custom"}], "collectionURL": "https://github.com", "packageURL": "pkg:github/vbwagner/catdoc", "repo": "https://github.com/vbwagner/catdoc"}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:fossies:catdoc:*:*:*:*:*:*:*:*", "versionEndIncluding": "0.95"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 6.1, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://hackmd.io/@haind-pwn/catdoc-xls-mulrk-endcol-and-string-count-oob-read", "tags": ["technical-description"]}, {"url": "https://github.com/vbwagner/catdoc/blob/38a2807d22ce1a08bc39b94e9072a9f8f52cd86f/src/xlsparse.c#L421-L520", "tags": ["technical-description"]}, {"url": "https://github.com/vbwagner/catdoc", "tags": ["product"]}, {"name": "VulnCheck Advisory: catdoc through 0.95 Out-of-Bounds Read via xls2csv copy_unicode_string", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/catdoc-through-0.95-out-of-bounds-read-via-xls2csv-copy-unicode-string"}], "credits": [{"lang": "en", "value": "HaiND from the Post and Telecommunication Institute of Technology", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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