{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "last_affected": "2.8.9"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "01751526f6e4154bcc8f517481d02b68cb2684a9"
            }
          ],
          "repo": "https://github.com/l429609201/misaka_danmu_server",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111643.json"
  },
  "details": "Misaka Danmu Server through 2.8.9 contains an authentication bypass vulnerability that allows unauthenticated attackers to write arbitrary configuration keys via the unprotected POST /api/ui/config-history/rollback endpoint. Attackers can set the ipWhitelist key to their own /32 address, or alter trustedProxies and webhookApiKey, to access every protected endpoint as the administrator.",
  "id": "CVE-2026-111643",
  "modified": "2026-10-21T02:31:07.586234559Z",
  "published": "2026-10-16T17:39:13.043Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111643.json"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/l429609201/misaka_danmu_server"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/api/ui/config_history.py#L51-L66"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/security.py#L136-L182"
    },
    {
      "type": "ADVISORY",
      "url": "https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authentication"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111643"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/misaka-danmu-server-through-2.8.9-authentication-bypass-via-config-history-rollback"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback"
}