{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.58.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "31a8f887a5cda517db7b4320a7ad997c87d08601"
            }
          ],
          "repo": "https://github.com/kimai/kimai",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-jr9p-4h4j-6c58"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1188"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52824.json"
  },
  "details": "Kimai is an open-source time tracking application. Prior to 2.58.0, the official Docker image sets APP_SECRET to the public value change_this_to_something_unique in Dockerfile, and .docker/entrypoint.sh neither replaces nor rejects that value before Symfony uses it as kernel.secret. An unauthenticated attacker who reaches a deployment that did not override APP_SECRET, knows a username, correctly guesses the account ID associated with that username, and targets an account without active two-factor authentication can forge HMAC-protected authentication artifacts, including KIMAI_REMEMBER cookies and login links, to access the account without its password. The updated entrypoint generates and persists a random secret when no safe operator-provided value exists. This issue is fixed in version 2.58.0.",
  "id": "CVE-2026-52824",
  "modified": "2026-09-18T03:30:38.713542602Z",
  "published": "2026-09-15T10:40:28.739Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kimai/kimai/releases/tag/2.58.0"
    },
    {
      "type": "WEB",
      "url": "https://www.kimai.org/en/security/ghsa-jr9p-4h4j-6c58"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52824.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/kimai/kimai/security/advisories/GHSA-jr9p-4h4j-6c58"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52824"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kimai/kimai/pull/5952"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Kimai: Default APP_SECRET in Docker Image Enables Cookie Forgery and Account Takeover"
}