{"api_version":"1","generated_at":"2026-05-08T10:59:23+00:00","cve":"CVE-2026-42267","urls":{"html":"https://cve.report/CVE-2026-42267","api":"https://cve.report/api/cve/CVE-2026-42267.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-42267","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-42267"},"summary":{"title":"Kimai: Formula Injection via tag names in XLSX export","description":"Kimai is an open-source time tracking application. From version 2.27.0 to before version 2.54.0, any ROLE_USER can create a tag with a formula string as its name (e.g. =SUM(54+51)) via POST /api/tags and assign it to a timesheet. When an admin exports timesheets to XLSX, ArrayFormatter.formatValue() joins tag names with implode() and returns the result unchanged. OpenSpout promotes any =-prefixed string to a FormulaCell, writing <f>SUM(54+51)</f> into the XLSX archive. Excel evaluates the formula when the file is opened. 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From version 2.27.0 to before version 2.54.0, any ROLE_USER can create a tag with a formula string as its name (e.g. =SUM(54+51)) via POST /api/tags and assign it to a timesheet. When an admin exports timesheets to XLSX, ArrayFormatter.formatValue() joins tag names with implode() and returns the result unchanged. OpenSpout promotes any =-prefixed string to a FormulaCell, writing <f>SUM(54+51)</f> into the XLSX archive. Excel evaluates the formula when the file is opened. This issue has been patched in version 2.54.0.","Type":"Description","Title":"Kimai: Formula Injection via tag names in XLSX export"}]}}}