What is CVE-2026-40479?

CVE-2026-40479 is a medium-severity vulnerability in Kimai, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-17.

How severe is CVE-2026-40479?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Kimai

CVE-2026-40479

Kimai is an open-source time tracking application. In versions 1.16.3 through 2.52.0, the escapeForHtml() function in KimaiEscape.js does not escape double quote or single quote characters. When a user's profile alias is inserted into an H…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (1.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Kimai — versions >= 1.16.3, < 2.53.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/kimai/kimai/security/advisories/GHSA-g82g-m9vx-vhjg (x_refsource_CONFIRM)
https://github.com/kimai/kimai/releases/tag/2.53.0 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-40479?: CVE-2026-40479 is a medium-severity vulnerability in Kimai, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-17.
How severe is CVE-2026-40479?: Medium severity. CVSS v3 base score is 5.4 out of 10.