CVE-2026-42267
5.7 · MEDIUMOverview
CVE-2026-42267 is a medium-severity vulnerability affecting kimai kimai. It was published on May 8, 2026 and has a CVSS 3.1 base score of 5.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from kimai. Update kimai to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| kimai | kimai | >= 2.27.0, < 2.54.0 | Affected |
Frequently Asked Questions
What is CVE-2026-42267?
CVE-2026-42267 is a medium-severity vulnerability affecting kimai kimai. It was published on May 8, 2026 and has a CVSS 3.1 base score of 5.7 (MEDIUM).
How severe is CVE-2026-42267?
This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-42267?
Check the references section for vendor advisories and patches from kimai. Update kimai to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-42267?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-42267 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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