{"schema_version":"1.9.0","id":"GHSA-x586-xvc8-g7q6","published":"2026-10-15T20:22:00Z","modified":"2026-10-15T20:30:03.950741495Z","aliases":["CVE-2026-84994"],"summary":"Qwik: Crashing any Qwik Server via Resource thenable","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.","affected":[{"package":{"name":"@builder.io/qwik","ecosystem":"npm","purl":"pkg:npm/%40builder.io/qwik"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.20.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-x586-xvc8-g7q6/GHSA-x586-xvc8-g7q6.json"}},{"package":{"name":"@qwik.dev/core","ecosystem":"npm","purl":"pkg:npm/%40qwik.dev/core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.0.0-beta37"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-x586-xvc8-g7q6/GHSA-x586-xvc8-g7q6.json"}}],"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"}],"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"},"severity":[{"type":"CVSS_V4","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"}]}