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 SUM(54+51) into the XLSX archive. Excel evaluates the formula when the file is opened. This issue has been patched in version 2.54.0.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
kimai/kimaiPackagist | >= 2.27.0, < 2.54.0 | 2.54.0 |
Affected products
3Patches
Vulnerability mechanics
References
4- github.com/kimai/kimai/security/advisories/GHSA-3xc2-h5r3-wv3rnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-3xc2-h5r3-wv3rghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-42267ghsaADVISORY
- github.com/kimai/kimai/releases/tag/2.54.0nvdProductRelease NotesWEB
News mentions
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