CVE-2026-100277

{
  "etk_id": "ETK-2026-126",
  "cve_id": "CVE-2026-100277",
  "display_id": "CVE-2026-100277",
  "ghsa_id": "GHSA-mqhr-7f7q-h475",
  "euvd_id": "EUVD-2026-90021",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Notification signature replay in JetBrains YouTrack",
  "summary": "JetBrains YouTrack versions before 2026.2.19197 do not adequately prevent reuse of notification signatures. An attacker who can replay a valid notification signature may take over an account.",
  "mitigation": "Upgrade JetBrains YouTrack to version 2026.2.19197 or later.",
  "vendor": "JetBrains",
  "product": "YouTrack",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 2026.2.19197"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "2026.2.19197"
      ],
      "package_name": "YouTrack",
      "purl": null
    }
  ],
  "cwes": [
    863
  ],
  "cvss_score": 8.9,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L",
  "epss_score": 0.0028,
  "epss_percentile": 0.1954,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 45.44404243333334,
  "t0_at": "2026-09-30T15:17:55.036000+00:00",
  "signals": {
    "check": {
      "at": "2026-09-30T16:49:24.931086+00:00",
      "days": 0.06354045238425926,
      "is_lower_bound": false,
      "measured_at": "2026-09-30T15:17:55.036000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-09-30T15:17:55.036000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-30T15:17:55.036000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-100277"
    }
  }
}