CVE-2026-42267
Kimai: Formula Injection via tag names in XLSX export
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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. This issue has been patched in version 2.54.0.
| CWE | CWE-1236 |
| Vendor | kimai |
| Product | kimai |
| Published | May 8, 2026 |
| Last Updated | May 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for kimai kimai
Be the first to know when new unknown vulnerabilities affecting kimai kimai are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
kimai / kimai
>= 2.27.0, < 2.54.0