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ETK-2026-119

ETK-2026-119Zero's internal tracking ID, independent of the CVE number.

validatedZero produced an exploit or a check.

GHSA-vcvr-r3jv-pc5j ↗

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).kevAttacks confirmed in the real world.
npm:next >= 16.2.0, < 16.3.6
fixed in 16.3.6
ETK-2026-119, no cve assigned
pkg:npm/next
cvss9.5cna vendorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
−20dTTV
24mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal +0dcheck available+0.0dagent stopped
0
+5d
+10d
+15d
+20d

description

Next.js applications using the Node.js next/og ImageResponse path may allow remote code execution during image rendering. Exposure requires attacker-controlled data to be incorporated into generated SVG content, attributes, or style values; the Edge implementation is not affected.

mitigation

Upgrade the next package to version 16.3.6. Until upgrades are complete, prevent untrusted input from reaching SVG content, attributes, or styles used by Node.js ImageResponse.

fixed in 16.3.6

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.
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
24m
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

Mechanism verified: the exploit fired on the vulnerable build and stayed silent on the patched one, but the server it ran against was ours, so no check ships for it.

source signals

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

  1. 2026-09-30 14:48Z
    ghsa: trigger signal, started the run
    https://github.com/advisories/GHSA-vcvr-r3jv-pc5j

this entry in the feed

GET /api/v1/feed/ETK-2026-119

{
  "etk_id": "ETK-2026-119",
  "cve_id": null,
  "display_id": "ETK-2026-119",
  "ghsa_id": "GHSA-vcvr-r3jv-pc5j",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Remote code execution in next/og Node.js ImageResponse",
  "summary": "Next.js applications using the Node.js `next/og` ImageResponse path may allow remote code execution during image rendering. Exposure requires attacker-controlled data to be incorporated into generated SVG content, attributes, or style values; the Edge implementation is not affected.",
  "mitigation": "Upgrade the `next` package to version 16.3.6. Until upgrades are complete, prevent untrusted input from reaching SVG content, attributes, or styles used by Node.js ImageResponse.",
  "vendor": "npm",
  "product": "npm:next",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 16.2.0, < 16.3.6"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "16.3.6"
      ],
      "package_name": "next",
      "purl": "pkg:npm/next"
    }
  ],
  "cwes": null,
  "cvss_score": 9.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "mechanism_verified",
  "exploit": false,
  "pipeline_minutes": 23.97363635,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-09-30T15:20:41.847496+00:00",
      "days": -20.36215499425926,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T00:02:12.091479+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-09-30T14:48:30+00:00",
      "days": -20.38451434027778,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T00:02:12.091479+00:00",
      "url": "https://github.com/advisories/GHSA-vcvr-r3jv-pc5j"
    }
  }
}

published 2026-09-30 14:56Z
last change 2026-10-20 23:46Z

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