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ETK-2026-1359Zero's internal tracking ID, independent of the CVE number.

ETK-2026-1359Zero's internal tracking ID, independent of the CVE number.

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

GHSA-cg2g-xh64-v4q7 ↗

no check availablenot proven exploitable
awaiting cvepublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).−8.9dkevAttacks confirmed in the real world.
npm:dompurify >= 3.4.4, <= 3.4.16
fixed in 3.4.17
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
ETK-2026-1359Zero's internal tracking ID, independent of the CVE number., no cve assigned
pkg:npm/dompurify
cvss7.2cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
9d 00h 20msince last run
10mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = trigger signal
waiting for further signals−0.1dtrigger signal +0dpublic poc+0d
+2d
+4d
+6d
+8d
+10d

description

DOMPurify before 3.4.17 can fail to remove template expressions assembled within attached shadow-root content. An attacker may cause template injection or script execution if they control such DOM input and the application enables template-safe sanitization, uses a DOM-returning or in-place mode, and later evaluates the sanitized content as a template.

mitigation

Upgrade the npm package dompurify to version 3.4.17 or later. Until upgraded, avoid passing attacker-controlled attached shadow roots through DOM-returning or in-place sanitization when their content may reach a template evaluator.

fixed in 3.4.17

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.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
10m
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).
−8.9d
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. 2026-10-12 12:40Z
  2. 2026-10-12 12:40Z

this entry in the feed

GET /api/v1/feed/ETK-2026-1359

{
  "etk_id": "ETK-2026-1359",
  "cve_id": null,
  "display_id": "ETK-2026-1359",
  "ghsa_id": "GHSA-cg2g-xh64-v4q7",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Shadow-root template injection bypass in DOMPurify",
  "summary": "DOMPurify before 3.4.17 can fail to remove template expressions assembled within attached shadow-root content. An attacker may cause template injection or script execution if they control such DOM input and the application enables template-safe sanitization, uses a DOM-returning or in-place mode, and later evaluates the sanitized content as a template.",
  "mitigation": "Upgrade the npm package `dompurify` to version 3.4.17 or later. Until upgraded, avoid passing attacker-controlled attached shadow roots through DOM-returning or in-place sanitization when their content may reach a template evaluator.",
  "vendor": "npm",
  "product": "npm:dompurify",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.4.4, <= 3.4.16"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "3.4.17"
      ],
      "package_name": "dompurify",
      "purl": "pkg:npm/dompurify"
    }
  ],
  "cwes": [
    79
  ],
  "cvss_score": 7.2,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 9.7330792,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-10-12T12:40:50+00:00",
      "days": -8.931224450162038,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T11:01:47.815291+00:00",
      "url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-cg2g-xh64-v4q7"
    },
    "trigger_signal": {
      "at": "2026-10-12T12:40:50+00:00",
      "days": -8.931224450162038,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T11:01:47.815291+00:00",
      "url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-cg2g-xh64-v4q7"
    }
  }
}

published 2026-10-12 13:06Z
last change 2026-10-21 10:52Z

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