{"id":"UBUNTU-CVE-2026-111126","details":"catdoc through 0.95 contains an out-of-bounds read vulnerability in the MULRK record handler of process_item() in src/xlsparse.c that allows attackers to read past the static rec buffer via a crafted end column. Attackers can supply a crafted .xls workbook or BIFF stream with a large endcol to xls2csv to disclose adjacent process memory as CSV cells or crash the process.","modified":"2026-10-17T12:59:52.064943375Z","published":"2026-10-16T00:00:00Z","upstream":["CVE-2026-111126"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-111126"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-111126"},{"type":"REPORT","url":"https://github.com/vbwagner/catdoc"},{"type":"REPORT","url":"https://github.com/vbwagner/catdoc/blob/38a2807d22ce1a08bc39b94e9072a9f8f52cd86f/src/xlsparse.c#L314-L328"},{"type":"REPORT","url":"https://hackmd.io/@haind-pwn/catdoc-xls-mulrk-endcol-and-string-count-oob-read"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/catdoc-through-0.95-out-of-bounds-read-in-xls2csv-mulrk-record-handler"}],"affected":[{"package":{"name":"catdoc","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/catdoc?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.94.4-1.1","1:0.94.3~git20151007.fd634c2+dfsg-2","1:0.94.3~git20151007.fd634c2+dfsg-3","1:0.94.3~git20160113.dbc9ec6+dfsg-1","1:0.94.3~git20160113.dbc9ec6+dfsg-1+deb9u1build0.16.04.1","1:0.94.3~git20160113.dbc9ec6+dfsg-1+deb9u1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"catdoc","binary_version":"1:0.94.3~git20160113.dbc9ec6+dfsg-1+deb9u1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111126.json"}},{"package":{"name":"catdoc","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/catdoc?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.95-3","1:0.95-4.1","1:0.95-4.1ubuntu0.18.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:0.95-4.1ubuntu0.18.04.1~esm1","binary_name":"catdoc"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111126.json"}},{"package":{"name":"catdoc","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/catdoc?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.95-4.1","1:0.95-4.1ubuntu0.20.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"catdoc","binary_version":"1:0.95-4.1ubuntu0.20.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111126.json"}},{"package":{"name":"catdoc","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/catdoc?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.95-4.1","1:0.95-4.2","1:0.95-5","1:0.95-5ubuntu0.22.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:0.95-5ubuntu0.22.04.1~esm1","binary_name":"catdoc"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111126.json"}},{"package":{"name":"catdoc","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/catdoc?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.95-5","1:0.95-5build1","1:0.95-5ubuntu0.24.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"catdoc","binary_version":"1:0.95-5ubuntu0.24.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111126.json"}},{"package":{"name":"catdoc","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/catdoc?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.95-6build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:0.95-6build1","binary_name":"catdoc"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111126.json"}},{"package":{"name":"catdoc","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/catdoc?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.95-6","1:0.95-6build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:0.95-6build1","binary_name":"catdoc"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111126.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"CVSS_V4","score":"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"},{"type":"Ubuntu","score":"medium"}]}