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ETK-2026-1560Zero's internal tracking ID, independent of the CVE number.

ETK-2026-1560Zero's internal tracking ID, independent of the CVE number.

waiting for further signalsZero needs more public information before it can validate it.

GHSA-mp7q-23hg-35cf ↗

no check availablenot proven exploitable
awaiting cvepublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
npm n8n < 1.123.85; < 2.44.1; < 2.43.5
fixed in >= 1.123.85, >= 2.44.1, >= 2.43.5
ETK-2026-1560Zero's internal tracking ID, independent of the CVE number., no cve assigned
pkg:npm/n8n
cvss8.4cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
7d 12h 47msince last run
32mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = trigger signal
waiting for further signals−0.7dtrigger signal +0d
+2d
+4d
+6d

description

Certain n8n webhook error and headerless responses may be served without the intended sandbox policy. A user who can create and activate a workflow may cause browser content to execute with the n8n site context when another user opens its webhook URL, potentially affecting that user's session.

mitigation

Upgrade n8n to >= 1.123.85, >= 2.44.1, >= 2.43.5 or later.

fixed in >= 1.123.85, >= 2.44.1, >= 2.43.5

check
no
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
yes, low privileges
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
32m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
not published yet
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Contextual: an exploit technique exists, but no deterministic check could cover this one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-14 09:35Z

this entry in the feed

GET /api/v1/feed/ETK-2026-1560

{
  "etk_id": "ETK-2026-1560",
  "cve_id": null,
  "display_id": "ETK-2026-1560",
  "ghsa_id": "GHSA-mp7q-23hg-35cf",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Stored cross-site scripting in n8n webhook responses",
  "summary": "Certain n8n webhook error and headerless responses may be served without the intended sandbox policy. A user who can create and activate a workflow may cause browser content to execute with the n8n site context when another user opens its webhook URL, potentially affecting that user's session.",
  "mitigation": "Upgrade n8n to >= 1.123.85, >= 2.44.1, >= 2.43.5 or later.",
  "vendor": "npm",
  "product": "n8n",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 1.123.85"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        ">= 1.123.85"
      ],
      "package_name": "n8n",
      "purl": "pkg:npm/n8n"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 2.44.1"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        ">= 2.44.1"
      ],
      "package_name": "n8n",
      "purl": "pkg:npm/n8n"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 2.43.5"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        ">= 2.43.5"
      ],
      "package_name": "n8n",
      "purl": "pkg:npm/n8n"
    }
  ],
  "cwes": null,
  "cvss_score": 8.4,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 31.862928366666665,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-10-14T09:35:01+00:00",
      "days": -6.842151301041667,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T05:47:42.928097+00:00",
      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-mp7q-23hg-35cf"
    }
  }
}

published 2026-10-14 10:18Z
last change 2026-10-21 05:31Z

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