{"schema":"threatline.record/2","record":{"id":"CVE-2026-84994","aliases":["GHSA-x586-xvc8-g7q6"],"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.","categories":["Libraries & packages"],"product":"@builder.io/qwik","vendor":"QwikDev","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-x586-xvc8-g7q6","source_modified_at":"2026-10-15T20:22:02Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@builder.io/qwik"},"range":"< 1.20.0"},{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-x586-xvc8-g7q6","source_modified_at":"2026-10-15T20:22:02Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@qwik.dev/core"},"range":"< 2.0.0-beta37"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-84994","source_modified_at":"2026-10-14T16:36:19.123Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"qwik","vendor":"QwikDev","versions":[{"version":"< 2.0.0-beta37","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-84994","source_modified_at":"2026-10-14T16:36:19.123Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"qwik","vendor":"@builder.io","versions":[{"version":"< 1.20.0","status":"affected"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-x586-xvc8-g7q6","source_modified_at":"2026-10-15T20:30:03.950741495Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"@builder.io/qwik","ecosystem":"npm","purl":"pkg:npm/%40builder.io/qwik"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.20.0"}]}],"versions":[]},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-x586-xvc8-g7q6","source_modified_at":"2026-10-15T20:30:03.950741495Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"@qwik.dev/core","ecosystem":"npm","purl":"pkg:npm/%40qwik.dev/core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.0.0-beta37"}]}],"versions":[]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-x586-xvc8-g7q6","source_modified_at":"2026-10-15T20:22:02Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@builder.io/qwik"},"version":"1.20.0"},{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-x586-xvc8-g7q6","source_modified_at":"2026-10-15T20:22:02Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@qwik.dev/core"},"version":"2.0.0-beta37"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-x586-xvc8-g7q6","source_modified_at":"2026-10-15T20:30:03.950741495Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"@builder.io/qwik","ecosystem":"npm","purl":"pkg:npm/%40builder.io/qwik"},"version":"1.20.0"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-x586-xvc8-g7q6","source_modified_at":"2026-10-15T20:30:03.950741495Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"@qwik.dev/core","ecosystem":"npm","purl":"pkg:npm/%40qwik.dev/core"},"version":"2.0.0-beta37"}],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00524,"percentile":0.43605,"score_date":"2026-10-23"},"published_at":"2026-10-13T19:00:53.742Z","modified_at":"2026-10-15T20:30:03.950741495Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-x586-xvc8-g7q6","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-15T20:22:02Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-84994","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-14T16:36:19.123Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-x586-xvc8-g7q6","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-15T20:30:03.950741495Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-84994","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/QwikDev/qwik/security/advisories/GHSA-x586-xvc8-g7q6","tags":["x_refsource_CONFIRM"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84994","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/QwikDev/qwik/pull/8655","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/QwikDev/qwik/commit/c1e7444402f9592b5cf9096e10bf303ab4640511","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/QwikDev/qwik/releases/tag/@builder.io/qwik@1.20.0","tags":["x_refsource_MISC"]},{"url":"https://github.com/advisories/GHSA-x586-xvc8-g7q6","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-14T16:35:04.214453Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-15T20:30:03.950741495Z","content_hash":"87ce119c8ad36cb81dabc2ced440539ec98f973510dc4cde7f11842e47a7dbd3"}}