CVE-2026-80199Kimai before 2.54.0 Username Enumeration via Timing Oracle
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-208
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
kimai kimai kimai:kimai (from the name) | before 2.54.0; 2.54.0 not affected | CNA record |
References
- https://github.com/kimai/kimai/security/advisories/GHSA-jrc6-fmhw-fpq2vendor-advisory
- https://www.vulncheck.com/advisories/kimai-before-2.54.0-username-enumeration-via-timing-oraclethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.