{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.20.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c1e7444402f9592b5cf9096e10bf303ab4640511"
            }
          ],
          "repo": "https://github.com/qwikdev/qwik",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-x586-xvc8-g7q6"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-248"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84994.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "2.0.0-beta37"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Qwik is a performance-focused JavaScript framework. Prior to @builder.io/qwik 1.20.0 and @qwik.dev/core 2.0.0-beta.37, default server-side qwik-json deserialization causes ResourceSerializer.$fill$ to pass resource._resolved to Promise.resolve without first rejecting attacker-controlled thenables. An unauthenticated request can provide a plain object whose then property is a QRL for an unregistered symbol, causing an orphaned asynchronous rejection that terminates Node.js under its default unhandled-rejection policy. A single request can crash a server, and repeated requests can keep replicas unavailable. This issue is fixed in @builder.io/qwik 1.20.0 and @qwik.dev/core 2.0.0-beta.37.",
  "id": "CVE-2026-84994",
  "modified": "2026-10-15T02:31:06.909955964Z",
  "published": "2026-10-13T19:00:53.742Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/QwikDev/qwik/releases/tag/@builder.io/qwik@1.20.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84994.json"
    },
    {
      "type": "ADVISORY",
      "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": "FIX",
      "url": "https://github.com/QwikDev/qwik/commit/c1e7444402f9592b5cf9096e10bf303ab4640511"
    },
    {
      "type": "FIX",
      "url": "https://github.com/QwikDev/qwik/pull/8655"
    }
  ],
  "schema_version": "1.9.0",
  "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"
}