{"id":"CVE-2026-54063","summary":"Excelize: Unbounded Row Index Allocation in Worksheet Parser (checkSheet OOM/Panic DoS)","details":"Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the checkSheet() function in github.com/xuri/excelize/v2 uses an attacker-controlled \u003crow r=\"N\"\u003e XML attribute value directly as the length argument to make([]xlsxRow, row) without validating it against the Excel row limit (TotalRows = 1,048,576). A specially crafted XLSX file can trigger two denial-of-service variants: (A) an out-of-memory process kill when r=2147483647 forces a ~16 GB allocation attempt, and (B) a runtime panic via out-of-bounds slice indexing when r=-1. Any service that opens attacker-supplied XLSX files and calls GetCellValue is affected. No authentication is required. This issue is fixed in version 2.11.0.","aliases":["GHSA-h69g-9hx6-f3v4"],"modified":"2026-07-18T03:47:37.679024277Z","published":"2026-07-10T15:53:31.020Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54063.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-770"]},"references":[{"type":"WEB","url":"https://github.com/qax-os/excelize/releases/tag/v2.11.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54063.json"},{"type":"ADVISORY","url":"https://github.com/qax-os/excelize/security/advisories/GHSA-h69g-9hx6-f3v4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54063"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/qax-os/excelize","events":[{"introduced":"0"},{"fixed":"90ff348959dd842cbf3a4fbd93a78afbe18db476"}],"database_specific":{"cpe":"cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.11.0"}],"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"]}}],"versions":["v2.10.1","v2.10.0","v2.9.1","v2.9.0","v2.8.1","v2.8.0","v2.7.1","v2.7.0","v2.6.1","v2.6.0","v2.5.0","v2.4.1","v2.4.0","v2.3.2","v2.3.1","v2.3.0","v2.2.0","v2.1.0","v2.0.2","v2.0.1","v2.0.0","v1.4.1","v1.4.0","v1.3.0","v1.2.0","v1.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54063.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}