CVE-2026-80199 — Kimai before 2.54.0 Username Enumeration via Timing Oracle
Kimai before 2.54.0 contains a timing oracle vulnerability in TokenAuthenticator that allows unauthenticated attackers to enumerate valid usernames via X-AUTH-USER header. Attac…
Published: 2026-08-25 · CVSS: 6.3 · CVSS 4.0
Kimai before 2.54.0 contains a timing oracle vulnerability in TokenAuthenticator that allows unauthenticated attackers to enumerate valid usernames via X-AUTH-USER header. Attackers can measure response time differences when the password hasher runs only for existing users, enabling username enumeration with no login throttling protection.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7