Kimai 2.61.0 before 2.63.0 Authentication Bypass via API

{
  "id": "e6f87810a7bd92f997cb9506ac1f6dcdfe24de5cf5875e33d24a8e1f427e38d3",
  "url": "https://osv.dev/vulnerability/CVE-2026-84805",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Kimai 2.61.0 before 2.63.0 Authentication Bypass via API",
    "summary": "Kimai versions from 2.61.0 before 2.63.0 fail to disable admin-only work-contract preferences for low-privilege users in the PATCH /api/users/{id}/preferences endpoint. Although the web interface gates these employment-contract fields behind the contract_other_profile admin permission, the WorkContractPreferenceSubscriber (introduced in 2.61.0) registers the preferences as enabled without a permission check, so an authenticated regular user can use the API to modify their own admin-only work-contract data. The issue is fixed in 2.63.0 by applying the same permission check to the API endpoint.",
    "evidence": "osv:CVE-2026-84805",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-84805",
      "aliases": [
        "CVE-2026-84805",
        "GHSA-5mpc-5cg2-g99r"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/kimai/kimai",
              "type": "GIT",
              "events": [
                {
                  "introduced": "368a8e48efac4ea2d644b466a8b19eb2fd68d31f"
                },
                {
                  "fixed": "2e1c9e48b437cce69dcd52d0083862237ce0b321"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.61.0"
                      },
                      {
                        "fixed": "2.63.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.62.0",
            "2.61.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84805.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.225701815Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84805.json",
        "https://github.com/kimai/kimai/security/advisories/GHSA-5mpc-5cg2-g99r",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-84805",
        "https://www.vulncheck.com/advisories/kimai-2.61.0-before-2.63.0-authentication-bypass-via-api"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84805.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-84805",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504312,
  "published_at": "2026-09-02T11:11:18.388+00:00"
}