{"id":"CVE-2026-111127","state":"PUBLISHED","title":"catdoc through 0.95 Out-of-Bounds Read via xls2csv copy_unicode_string","description":"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.","publishedAt":"2026-10-15T18:57:23.479Z","updatedAt":"2026-10-16T17:10:59.137Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["catdoc catdoc"],"affected":[{"vendor":"catdoc","product":"catdoc","packageURL":"pkg:github/vbwagner/catdoc","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.95","versionType":"custom"}],"collectionURL":"https://github.com","repo":"https://github.com/vbwagner/catdoc"}],"references":["https://hackmd.io/@haind-pwn/catdoc-xls-mulrk-endcol-and-string-count-oob-read","https://github.com/vbwagner/catdoc/blob/38a2807d22ce1a08bc39b94e9072a9f8f52cd86f/src/xlsparse.c#L421-L520","https://github.com/vbwagner/catdoc","https://www.vulncheck.com/advisories/catdoc-through-0.95-out-of-bounds-read-via-xls2csv-copy-unicode-string"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/111xxx/CVE-2026-111127.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-111127","state":"PUBLISHED","datePublished":"2026-10-15T18:57:23.479Z","dateUpdated":"2026-10-16T17:10:59.137Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-15T17:03:51.865Z"},"containers":{"cna":{"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. 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