{"id":"CVE-2026-80199","revision":"daab1f32e8e8495db9c227fa4528739f","records":[{"revision":"daab1f32e8e8495db9c227fa4528739f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80199","aliases":[],"title":"Kimai before 2.54.0 Username Enumeration via Timing Oracle","description":"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.","state":0,"publishedAt":"2026-08-25T23:19:05.166+00:00","modifiedAt":"2026-10-08T15:25:19.728+00:00","affected":[{"ecosystem":"Vendor product","name":"kimai","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"kimai\",\n                    \"product\": \"kimai\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.54.0\"\n                        },\n                        {\n                            \"version\": \"2.54.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:composer/kimai/kimai\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","score":3.7,"severity":"LOW"}],"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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80199","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80199","identifiers":["CVE-2026-80199"]},"retained":false,"historicalAffected":[]}],"coverage":[]}