CVE•Published 2026-05-08•Modified 2026-05-13•0 articles on news•6 live references•NVD data

CVE-2026-42267Kimai · Kimai

Vulnerability data via NVD (ingested)

CVSS v3.1

5.7

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

EPSS percentile

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Weaknesses (CWE)

CWE-1236Improper Neutralization of Formula Elements in a CSV File

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.

Timeline

Published 2026-05-08

Modified 2026-05-13

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-42267

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Kimai Kimai"

All exposed Kimai Kimai instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Kimai"

HTTP body or banner mentions "Kimai" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-42267