CVE-2026-126051

validatedZero produced an exploit or a check.

EUVD-2026-123706 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
nodejs node >= 24.0.0, < 24.22.3; >= 25.0.0, < 26.13.1
fixed in 24.22.3, 26.13.1
CWE-476 NULL Pointer Dereference
ETK-2026-4202Zero's internal tracking ID, independent of the CVE number., permanent identifier
+43mTTV
16mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org publication
trigger signal (cve.org) +0mcheck available+43magent stopped
0
+10min
+20min
+30min
+40min

description

Node.js 24.x and 26.x TLS servers can terminate when deferred handshake callbacks run after the underlying socket has been destroyed. A remote unauthenticated client can trigger the condition when the server uses SNICallback, OCSPRequest, newSession, resumeSession, or server.addContext().

mitigation

Upgrade Node.js to 24.22.3 or 26.13.1. Until upgraded, reduce exposure by disabling affected TLS handshake hooks where feasible.

fixed in 24.22.3, 26.13.1

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
16m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-11-11 18:35Z
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 check: a technique exists and was validated, 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. 2026-11-11 18:35Z
    cve_org: trigger signal, started the run

this entry in the feed

GET /api/v1/feed/CVE-2026-126051

{
  "etk_id": "ETK-2026-4202",
  "cve_id": "CVE-2026-126051",
  "display_id": "CVE-2026-126051",
  "ghsa_id": null,
  "euvd_id": "EUVD-2026-123706",
  "status": "published",
  "anchor_state": "anchored",
  "title": "TLS handshake use-after-destroy in Node.js",
  "summary": "Node.js 24.x and 26.x TLS servers can terminate when deferred handshake callbacks run after the underlying socket has been destroyed. A remote unauthenticated client can trigger the condition when the server uses SNICallback, OCSPRequest, newSession, resumeSession, or server.addContext().",
  "mitigation": "Upgrade Node.js to 24.22.3 or 26.13.1. Until upgraded, reduce exposure by disabling affected TLS handshake hooks where feasible.",
  "vendor": "nodejs",
  "product": "node",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 24.0.0, < 24.22.3",
        ">= 25.0.0, < 26.13.1"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "24.22.3",
        "26.13.1"
      ],
      "package_name": "node",
      "purl": null
    }
  ],
  "cwes": [
    476
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 16.036175916666668,
  "t0_at": "2026-11-11T18:35:45.777000+00:00",
  "signals": {
    "check": {
      "at": "2026-11-11T19:19:14.420881+00:00",
      "days": 0.030192637511574073,
      "is_lower_bound": false,
      "measured_at": "2026-11-11T18:35:45.777000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-11-11T18:35:45.777000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-11T18:35:45.777000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-126051"
    }
  }
}

published 2026-11-11 19:03Z
last change 2026-11-11 20:44Z

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