ETK-2026-1136Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-1136",
  "cve_id": null,
  "display_id": "ETK-2026-1136",
  "ghsa_id": "GHSA-5896-rqg6-cqjr",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Improper callback authorization in filex backend",
  "summary": "filex backend before 0.54.0 is affected when ONLYOFFICE integration is configured. A signed-in user able to open an office document may overwrite files in other tenants or cause server-side requests to attacker-selected URLs.",
  "mitigation": "Upgrade filex backend to version 0.54.0. Until upgraded, restrict ONLYOFFICE callback requests at the reverse proxy to the document server's address, or disable the ONLYOFFICE integration.",
  "vendor": "go",
  "product": "go:github.com/brf-tech/filex/backend",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 0.53.0"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "0.54.0"
      ],
      "package_name": "github.com/brf-tech/filex/backend",
      "purl": "pkg:golang/github.com/brf-tech/filex/backend"
    }
  ],
  "cwes": [
    345
  ],
  "cvss_score": 9.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 14.676156516666667,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-10-08T16:43:58+00:00",
      "days": -12.505204985601852,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T04:51:27.732093+00:00",
      "url": "https://github.com/BRF-Tech/filex/security/advisories/GHSA-5896-rqg6-cqjr"
    }
  }
}