Security advisory

{
  "id": "623b96378ee5d5853b46b04805a8e5dd36fb5c3996b45184e328a784ace9d639",
  "url": "https://osv.dev/vulnerability/CVE-2026-23923",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-23923",
    "summary": "An unauthenticated attacker can exploit the Frontend 'validate' action to blindly instantiate arbitrary PHP classes. The impact depends on environment setup but appears limited at this time.",
    "evidence": "osv:CVE-2026-23923",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-23923",
      "aliases": [
        "CVE-2026-23923"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zabbix/zabbix",
              "type": "GIT",
              "events": [
                {
                  "introduced": "372a4e93c48ecd25aa666949a055a02369031861"
                },
                {
                  "fixed": "b033beafb23d83ecb4e90a9b6f9ea856e9215566"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.4.0"
                      },
                      {
                        "fixed": "7.4.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "7.4.7rc3",
            "7.4.7rc2",
            "7.4.7rc1",
            "7.4.6",
            "7.4.6rc2",
            "7.4.6rc1",
            "7.4.5",
            "7.4.4",
            "7.4.4rc1",
            "7.4.3",
            "7.4.3rc1",
            "7.4.2",
            "7.4.2rc2",
            "7.4.2rc1",
            "7.4.1",
            "7.4.1rc1",
            "7.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23923.json",
            "vanir_signatures": [
              {
                "id": "CVE-2026-23923-234b3a70",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "325384714460559008211380272189886777379",
                    "161202494417122568768003688957558185717",
                    "78613746942143536196276371120859374090",
                    "98679310835563898350721270856285671786",
                    "113434350780301213082882425875976030982",
                    "296560762299850979029643899112001044678"
                  ]
                },
                "source": "https://github.com/zabbix/zabbix/commit/b033beafb23d83ecb4e90a9b6f9ea856e9215566",
                "target": {
                  "file": "src/zabbix_java/src/com/zabbix/gateway/GeneralInformation.java"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-24T14:58:36Z"
          }
        }
      ],
      "modified": "2026-10-24T14:58:36.741260828Z",
      "provider": "osv",
      "references": [
        "https://support.zabbix.com/browse/ZBX-27641"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-23923",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443902,
  "published_at": "2026-03-24T19:16:50.74+00:00"
}