alf.io has Improper Access Control for Organization Owners that Exposes System Secrets

{
  "id": "d772fa157c4ae2f124294987b69e858ca9b2c27ebec839645e67824e2fff9706",
  "url": "https://osv.dev/vulnerability/CVE-2026-50165",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "alf.io has Improper Access Control for Organization Owners that Exposes System Secrets",
    "summary": "alf.io is an open source ticket reservation system for conferences, trade shows, workshops, and meetups. An Improper Access Control issue in versions prior to 2.0-M5-2605 allows an organization owner to read system-level configuration secrets through organization/event scoped \"single configuration\" endpoints. The affected endpoints require organization or event ownership, but they accept an arbitrary configuration key and then return the first matching value from a lookup that includes system-level configuration. As a result, an organization owner can retrieve secrets intended to be administrator-only, including the system API key when it is configured. Version 2.0-M5-2605 fixes the issue.",
    "evidence": "osv:CVE-2026-50165",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-50165",
      "aliases": [
        "CVE-2026-50165",
        "GHSA-x473-r8w6-fcq5"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/alfio-event/alf.io",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2b4759f9136cf5c6f5cb7784c30c9a09da217151"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.0-M5-2606"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.0-M5-2509",
            "2.0-M5-2502",
            "2.0-M5",
            "2.0-M4-2304",
            "2.0-M4-2301",
            "2.0-M4-2204",
            "2.0-M4",
            "2.0-M4.RC4",
            "2.0-M4.RC3",
            "2.0-M4.RC2",
            "2.0-M4.RC1",
            "2.0-M3",
            "2.0-M2",
            "2.0-M1-1906",
            "2.0-M1-1906.1",
            "2.0-M1",
            "2.0-M0",
            "1.14.1",
            "1.14",
            "1.14-RC2",
            "1.14-RC1",
            "1.13",
            "1.13-RC3",
            "1.13-RC2",
            "1.13-RC1",
            "1.12",
            "1.12-RC4",
            "1.12-RC3",
            "1.12-RC2",
            "1.12-RC1",
            "1.11",
            "1.10.1",
            "1.10",
            "1.10-RC2",
            "1.10-RC1",
            "1.9.1",
            "1.9",
            "1.8",
            "1.8-RC2",
            "1.8-RC1",
            "1.7",
            "1.6",
            "1.5",
            "1.4.1",
            "1.4",
            "1.4-RC2",
            "alfio-1.3.1",
            "alfio-1.3",
            "alfio-1.3-beta1",
            "alfio-1.2",
            "alfio-1.1",
            "v1.0-pre-rename-v2",
            "v1.0-pre-rename"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50165.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.612833319Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50165.json",
        "https://github.com/alfio-event/alf.io/security/advisories/GHSA-x473-r8w6-fcq5",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-50165"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-284"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50165.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-50165",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497633,
  "published_at": "2026-09-09T20:25:55.46+00:00"
}