{"id":"CVE-2026-54063","sourceIdentifier":"security-advisories@github.com","published":"2026-07-10T17:16:58.440","lastModified":"2026-07-16T14:11:27.260","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"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 <row r=\"N\"> 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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"qax-os","product":"excelize","versions":[{"version":"< 2.11.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-10T18:39:45.896640Z","id":"CVE-2026-54063","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-770"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*","versionEndExcluding":"2.11.0","matchCriteriaId":"3109CFB1-75AF-4979-A10A-21F859C5D249"}]}]}],"references":[{"url":"https://github.com/qax-os/excelize/releases/tag/v2.11.0","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/qax-os/excelize/security/advisories/GHSA-h69g-9hx6-f3v4","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]},{"url":"https://github.com/qax-os/excelize/security/advisories/GHSA-h69g-9hx6-f3v4","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Vendor Advisory"]}]}