{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80199", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-25T23:14:37.730Z", "datePublished": "2026-08-25T23:19:05.166Z", "dateUpdated": "2026-08-25T23:19:05.166Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-25T23:19:05.166Z"}, "datePublic": "2026-04-16T00:00:00.000Z", "title": "Kimai before 2.54.0 Username Enumeration via Timing Oracle", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Observable Timing Discrepancy", "cweId": "CWE-208", "type": "CWE"}]}], "affected": [{"vendor": "kimai", "product": "kimai", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "2.54.0"}, {"version": "2.54.0", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.54.0"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseScore": 3.7, "baseSeverity": "LOW"}}], "references": [{"url": "https://github.com/kimai/kimai/security/advisories/GHSA-jrc6-fmhw-fpq2", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-jrc6-fmhw-fpq2)"}, {"name": "VulnCheck Advisory: Kimai before 2.54.0 Username Enumeration via Timing Oracle", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/kimai-before-2.54.0-username-enumeration-via-timing-oracle"}], "credits": [{"lang": "en", "value": "melnicek", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.54.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "2.54.0"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "kimai", "source": "cna", "vendor": "kimai"}, "product": "kimai", "vendor": "kimai"}], "created": "2026-08-26T01:00:06.990897+00:00", "updated": "2026-08-26T01:45:03.410111+00:00", "vendors": ["kimai", "kimai$PRODUCT$kimai"]}