{"id":"CVE-2026-107223","revision":"877e565c2a9e4b9e95b54042352002da","records":[{"revision":"877e565c2a9e4b9e95b54042352002da","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-107223","aliases":[],"title":"Excelize: Unbounded <col max> attribute is loaded with no MaxColumns check and expanded per-column by flatCols(), so any column mutator hangs or OOMs the process","description":"Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, flatCols expands file-loaded column ranges without validating Min and Max against the worksheet column limit. SetColWidth reaches flatCols, which expands xlsxCol.Min through xlsxCol.Max without enforcing MaxColumns. When a crafted worksheet supplies an oversized col max attribute and the application invokes a column mutator, flatCols performs a deep copy and append for every attacker-selected column number, allowing an attacker to consume excessive CPU and memory or trigger OOM. No fixed version is available as of this review.","state":0,"publishedAt":"2026-10-07T18:48:54.172+00:00","modifiedAt":"2026-10-07T22:05:27.449+00:00","affected":[{"ecosystem":"Vendor product","name":"excelize","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"qax-os\",\n                    \"product\": \"excelize\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 2.1.0, <= 2.11.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":7.1,"severity":"HIGH"}],"references":["https://github.com/qax-os/excelize/security/advisories/GHSA-fq3v-74gv-27gm","https://github.com/qax-os/excelize/pull/2370","https://github.com/qax-os/excelize/commit/a54c578af309fa81f448143ed2b7a91192cc58a7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-107223","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-107223","identifiers":["CVE-2026-107223"]},"retained":false,"historicalAffected":[]}],"coverage":[]}