Security advisory

{
  "id": "76e07cb2304cf7622d21e2d8c0ebc68a6b2dd86fd67adf4ae533a727dc0217ba",
  "url": "https://osv.dev/vulnerability/CVE-2026-23934",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-23934",
    "summary": "An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.",
    "evidence": "osv:CVE-2026-23934",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-23934",
      "aliases": [
        "CVE-2026-23934"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zabbix/zabbix",
              "type": "GIT",
              "events": [
                {
                  "introduced": "372a4e93c48ecd25aa666949a055a02369031861"
                },
                {
                  "fixed": "63588e12eb23a212c837dbbacb005949673b353a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.4.0"
                      },
                      {
                        "fixed": "7.4.12"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "7.4.12rc1",
            "7.4.11",
            "7.4.11rc2",
            "7.4.11rc1",
            "7.4.10",
            "7.4.10rc1",
            "7.4.9",
            "7.4.9rc1",
            "7.4.8",
            "7.4.8rc3",
            "7.4.8rc2",
            "7.4.8rc1",
            "7.4.7",
            "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-2026-23934.json",
            "vanir_signatures": [
              {
                "id": "CVE-2026-23934-bd62128e",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "162185643356969056099637373121662685754",
                    "301884150383061037293106834306734767993",
                    "63167804984895644221201641958791481105",
                    "38852671883870847759498189347652476358",
                    "282755891262507678007721094843042318317",
                    "41809926521244952597844054970073719247"
                  ]
                },
                "source": "https://github.com/zabbix/zabbix/commit/63588e12eb23a212c837dbbacb005949673b353a",
                "target": {
                  "file": "src/zabbix_java/src/com/zabbix/gateway/GeneralInformation.java"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-24T15:10:36Z"
          }
        }
      ],
      "modified": "2026-10-24T15:10:36.557160637Z",
      "provider": "osv",
      "references": [
        "https://support.zabbix.com/browse/ZBX-28072"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-23934",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443931,
  "published_at": "2026-08-18T13:17:21.717+00:00"
}