Medium severity5.7GHSA Advisory· Published May 8, 2026· Updated May 13, 2026
CVE-2026-42267
CVE-2026-42267
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. This issue has been patched in version 2.54.0.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- github.com/kimai/kimai/security/advisories/GHSA-3xc2-h5r3-wv3rnvdExploitMitigationVendor Advisory
- github.com/advisories/GHSA-3xc2-h5r3-wv3rghsaADVISORY
- github.com/kimai/kimai/releases/tag/2.54.0nvdProductRelease Notes
- nvd.nist.gov/vuln/detail/CVE-2026-42267ghsa
News mentions
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