CVE-2026-109954

{
  "etk_id": "ETK-2026-1471",
  "cve_id": "CVE-2026-109954",
  "display_id": "CVE-2026-109954",
  "ghsa_id": "GHSA-jhh9-hrgh-c9gv",
  "euvd_id": "EUVD-2026-98658",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Concurrent transaction state race in parse-server",
  "summary": "Affected parse-server releases can mix transaction-batch state between simultaneous client requests. An unauthenticated client able to submit transactional batch requests may disrupt other clients' writes; on PostgreSQL or MongoDB replica-set or sharded deployments, this can include reverted acknowledged writes or write failures.",
  "mitigation": "Upgrade parse-server to 8.6.96 or 9.10.2-alpha.5, as appropriate for your release branch. Until upgraded, restrict access to transactional batch endpoints to trusted clients and monitor for stalled PostgreSQL transactions.",
  "vendor": "parse-community",
  "product": "parse-server",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 9.0.0, < 9.10.2-alpha.5"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "9.10.2-alpha.5"
      ],
      "package_name": "parse-server",
      "purl": "pkg:npm/parse-server"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 5.4.0, < 8.6.96"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "8.6.96"
      ],
      "package_name": "parse-server",
      "purl": "pkg:npm/parse-server"
    }
  ],
  "cwes": [
    362
  ],
  "cvss_score": 8.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0022,
  "epss_percentile": 0.1158,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 46.94016845,
  "t0_at": "2026-10-13T13:27:19.012000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-01T02:18:54.002123+00:00",
      "days": -12.46417835505787,
      "is_lower_bound": false,
      "measured_at": "2026-10-13T13:27:19.012000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-09-28T22:45:02+00:00",
      "days": -14.612696898148148,
      "is_lower_bound": false,
      "measured_at": "2026-10-13T13:27:19.012000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-109954"
    }
  }
}