Timing Attack Affecting kimai/kimai package, versions <2.54.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-KIMAIKIMAI-16109627
- published19 Apr 2026
- disclosed17 Apr 2026
- creditmelnicek
Introduced: 17 Apr 2026
CVE-2026-80199 (opens in a new tab)How to fix?
Upgrade kimai/kimai to version 2.54.0 or higher.
Overview
Affected versions of this package are vulnerable to Timing Attack via the TokenAuthenticator process. An attacker can determine valid usernames by measuring response time differences when submitting authentication requests with the X-AUTH-USER header.