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ETK-2026-2006Zero's internal tracking ID, independent of the CVE number.

ETK-2026-2006Zero's internal tracking ID, independent of the CVE number.

validatedZero produced an exploit or a check.

GHSA-4xm8-rg9h-jhq2 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
awaiting cvepublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).−2.5dkevAttacks confirmed in the real world.
npm:signalk-server >= 2.0.0; 1.0.0 - 1.5.2
fixed in 2.34.0, 1.5.3
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
ETK-2026-2006Zero's internal tracking ID, independent of the CVE number., no cve assigned
pkg:npm/signalk-server
pkg:npm/@signalk/resources-provider
cvss9.8cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
−2.5dTTV
20mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal +0dpublic poc+0dcheck available+0.0dagent stopped
0
+1d
+2d

description

signalk-server releases before 2.34.0 and @signalk/resources-provider releases before 1.5.3 can allow resource API requests to access files beyond the intended storage area. An attacker may read, alter, or remove exposed files and could escalate further if sensitive configuration data is accessible; anonymous access requires allow_readonly=true, while other deployments require read-only credentials.

mitigation

Upgrade signalk-server to 2.34.0 or later and @signalk/resources-provider to 1.5.3 or later. Until updates are applied, disable anonymous read-only access and limit resource API access to trusted users and networks.

fixed in 2.34.0, 1.5.3

check
available
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.
deterministic
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
20m
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).
−2.5d
Δ to kevAttacks confirmed in the real world.
–

outcome

Check only, differential: the check fires on the vulnerable build and is silent on the patched one.

source signals

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

  1. 2026-10-18 19:03Z
  2. 2026-10-18 19:03Z

this entry in the feed

GET /api/v1/feed/ETK-2026-2006

{
  "etk_id": "ETK-2026-2006",
  "cve_id": null,
  "display_id": "ETK-2026-2006",
  "ghsa_id": "GHSA-4xm8-rg9h-jhq2",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Path traversal in signalk-server resource APIs",
  "summary": "signalk-server releases before 2.34.0 and @signalk/resources-provider releases before 1.5.3 can allow resource API requests to access files beyond the intended storage area. An attacker may read, alter, or remove exposed files and could escalate further if sensitive configuration data is accessible; anonymous access requires `allow_readonly=true`, while other deployments require read-only credentials.",
  "mitigation": "Upgrade signalk-server to 2.34.0 or later and @signalk/resources-provider to 1.5.3 or later. Until updates are applied, disable anonymous read-only access and limit resource API access to trusted users and networks.",
  "vendor": "npm",
  "product": "npm:signalk-server",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.0.0"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "2.34.0"
      ],
      "package_name": "signalk-server",
      "purl": "pkg:npm/signalk-server"
    },
    {
      "affected_notes": [
        "1.0.0 - 1.5.2"
      ],
      "affected_ranges": [],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.5.3"
      ],
      "package_name": "@signalk/resources-provider",
      "purl": "pkg:npm/@signalk/resources-provider"
    }
  ],
  "cwes": [
    22
  ],
  "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": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 19.959615833333334,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-10-18T20:02:45.075601+00:00",
      "days": -2.474784328113426,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T07:26:26.509034+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-10-18T19:03:54+00:00",
      "days": -2.5156532586805556,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T07:26:26.509034+00:00",
      "url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-4xm8-rg9h-jhq2"
    },
    "trigger_signal": {
      "at": "2026-10-18T19:03:54+00:00",
      "days": -2.5156532586805556,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T07:26:26.509034+00:00",
      "url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-4xm8-rg9h-jhq2"
    }
  }
}

published 2026-10-18 19:42Z
last change 2026-10-21 07:05Z

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