{"id":"CVE-2026-80195","state":"PUBLISHED","title":"Kimai before 2.63.0 Team Membership Removal via API","description":"Kimai before 2.63.0 contains a business logic / improper authorization vulnerability in the team update API endpoint (PATCH /api/teams/{id}), which removes all existing team members before validating the submitted replacement member list. An authenticated teamlead (or other user) with permission to edit a team can submit a malformed members payload; although Kimai returns a validation error, the existing membership rows have already been deleted. This bypasses the dedicated member-removal endpoint's protection against removing teamleaders and can leave a team with no members or teamleaders, disrupting team-based access control.","publishedAt":"2026-08-25T23:19:02.395Z","updatedAt":"2026-08-26T16:10:29.520Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["kimai kimai"],"affected":[{"vendor":"kimai","product":"kimai","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.63.0","versionType":"semver"},{"version":"2.63.0","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/kimai/kimai/security/advisories/GHSA-6rxf-4hh9-pp46","https://www.vulncheck.com/advisories/kimai-before-2.63.0-team-membership-removal-via-api"],"weaknesses":["CWE-841"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80195.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80195","state":"PUBLISHED","datePublished":"2026-08-25T23:19:02.395Z","dateUpdated":"2026-08-26T16:10:29.520Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-25T23:14:37.730Z"},"containers":{"cna":{"title":"Kimai before 2.63.0 Team Membership Removal via API","descriptions":[{"lang":"en","value":"Kimai before 2.63.0 contains a business logic / improper authorization vulnerability in the team update API endpoint (PATCH /api/teams/{id}), which removes all existing team members before validating the submitted replacement member list. 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This bypasses the dedicated member-removal endpoint's protection against removing teamleaders and can leave a team with no members or teamleaders, disrupting team-based access control."}],"affected":[{"vendor":"kimai","product":"kimai","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.63.0","versionType":"semver"},{"version":"2.63.0","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/kimai/kimai/security/advisories/GHSA-6rxf-4hh9-pp46","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-6rxf-4hh9-pp46)"},{"url":"https://www.vulncheck.com/advisories/kimai-before-2.63.0-team-membership-removal-via-api","name":"VulnCheck Advisory: Kimai before 2.63.0 Team Membership Removal via API","tags":["third-party-advisory"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS"},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-841","lang":"en","description":"Improper Enforcement of Behavioral Workflow","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-25T23:19:02.395Z"},"datePublic":"2026-08-05T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:*","versionEndExcluding":"2.63.0"}]}]}],"credits":[{"lang":"en","value":"mattmumford-git","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-26T15:57:20.465635Z","id":"CVE-2026-80195","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-26T16:10:29.520Z"}}]}}}