CVE-2026-80199
6.3
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| kimai | kimai | 0 < 2.54.0 | affected |
| kimai | kimai | 2.54.0 | unaffected |
Weaknesses
- CWE-208: Observable Timing Discrepancy
References
- https://github.com/kimai/kimai/security/advisories/GHSA-jrc6-fmhw-fpq2
- https://www.vulncheck.com/advisories/kimai-before-2.54.0-username-enumeration-via-timing-oracle
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