GHSA-X586-XVC8-G7Q6

Vulnerability from github – Published: 2026-10-15 20:22 – Updated: 2026-10-15 20:22
VLAI
Summary
Qwik: Crashing any Qwik Server via Resource thenable
Details

Summary

A Qwik server in the default configuration can be crashed with one unauthenticated HTTP request. During qwik-json body parsing, ResourceSerializer.$fill$ does Promise.resolve(resource._resolved). If _resolved is a plain object whose .then is a QRL for an unregistered symbol, the async QRL rejects, the rejection is orphaned, and Node terminates the process via its default unhandled-rejection policy.

Impact

One unauthenticated request crashes the server. Looping keeps every replica dead as long as the attacker sends requests.

Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@builder.io/qwik"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "@qwik.dev/core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.0-beta37"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-84994"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-248"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-15T20:22:00Z",
    "nvd_published_at": "2026-10-13T19:20:52Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nA Qwik server in the default configuration can be crashed with one unauthenticated HTTP request. During qwik-json body parsing, `ResourceSerializer.$fill$` does `Promise.resolve(resource._resolved)`. If `_resolved` is a plain object whose `.then` is a QRL for an unregistered symbol, the async QRL rejects, the rejection is orphaned, and Node terminates the process via its default unhandled-rejection policy.\n\n### Impact\n\nOne unauthenticated request crashes the server. Looping keeps every replica dead as long as the attacker sends requests.",
  "id": "GHSA-x586-xvc8-g7q6",
  "modified": "2026-10-15T20:22:00Z",
  "published": "2026-10-15T20:22:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/QwikDev/qwik/security/advisories/GHSA-x586-xvc8-g7q6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84994"
    },
    {
      "type": "WEB",
      "url": "https://github.com/QwikDev/qwik/pull/8655"
    },
    {
      "type": "WEB",
      "url": "https://github.com/QwikDev/qwik/commit/c1e7444402f9592b5cf9096e10bf303ab4640511"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/QwikDev/qwik"
    },
    {
      "type": "WEB",
      "url": "https://github.com/QwikDev/qwik/releases/tag/@builder.io/qwik@1.20.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Qwik: Crashing any Qwik Server via Resource thenable"
}



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