CVE-2026-105639

{
  "etk_id": "ETK-2026-671",
  "cve_id": "CVE-2026-105639",
  "display_id": "CVE-2026-105639",
  "ghsa_id": "GHSA-4vj8-p63v-8p24",
  "euvd_id": "EUVD-2026-92595",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Email-verification flaw enables invitation hijack in makeplane plane",
  "summary": "makeplane plane versions before 1.4.0 do not verify ownership of an email address during signup. An attacker who knows an invitee's email and has a pending invitation can register with that address and join the workspace with the invitation's assigned role.",
  "mitigation": "Upgrade makeplane plane to version 1.4.0 or later. Until upgrading, limit or suspend invitations for accounts whose email ownership has not been independently verified.",
  "vendor": "makeplane",
  "product": "plane",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 1.3.1"
      ],
      "ecosystem": "other",
      "fixed_versions": [
        "1.4.0"
      ],
      "package_name": "makeplane/plane",
      "purl": null
    }
  ],
  "cwes": [
    200
  ],
  "cvss_score": 9.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": 0.0039,
  "epss_percentile": 0.3211,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 64.30041621666666,
  "t0_at": "2026-10-05T18:10:35.787000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-08-03T07:04:44+00:00",
      "days": -63.46240494212963,
      "is_lower_bound": false,
      "measured_at": "2026-10-05T18:10:35.787000+00:00",
      "url": "https://github.com/makeplane/plane/security/advisories/GHSA-4vj8-p63v-8p24"
    },
    "trigger_signal": {
      "at": "2026-10-05T18:10:35.787000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-05T18:10:35.787000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-105639"
    }
  }
}