{"id":"CVE-2026-84994","state":"PUBLISHED","title":"Qwik: Crashing any Qwik Server via Resource thenable","description":"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.","publishedAt":"2026-10-13T19:00:53.742Z","updatedAt":"2026-10-14T16:36:19.123Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["QwikDev qwik","@builder.io qwik"],"affected":[{"vendor":"QwikDev","product":"qwik","versions":[{"version":"< 2.0.0-beta37","status":"affected"}]},{"vendor":"@builder.io","product":"qwik","versions":[{"version":"< 1.20.0","status":"affected"}]}],"references":["https://github.com/QwikDev/qwik/security/advisories/GHSA-x586-xvc8-g7q6","https://github.com/QwikDev/qwik/pull/8655","https://github.com/QwikDev/qwik/commit/c1e7444402f9592b5cf9096e10bf303ab4640511","https://github.com/QwikDev/qwik/releases/tag/@builder.io/qwik@1.20.0"],"weaknesses":["CWE-248"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/84xxx/CVE-2026-84994.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-84994","state":"PUBLISHED","datePublished":"2026-10-13T19:00:53.742Z","dateUpdated":"2026-10-14T16:36:19.123Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-02T18:12:13.535Z"},"containers":{"cna":{"title":"Qwik: Crashing any Qwik Server via Resource thenable","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"QwikDev","product":"qwik","versions":[{"version":"< 2.0.0-beta37","status":"affected"}]},{"vendor":"@builder.io","product":"qwik","versions":[{"version":"< 1.20.0","status":"affected"}]}],"references":[{"url":"https://github.com/QwikDev/qwik/security/advisories/GHSA-x586-xvc8-g7q6","name":"https://github.com/QwikDev/qwik/security/advisories/GHSA-x586-xvc8-g7q6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/QwikDev/qwik/pull/8655","name":"https://github.com/QwikDev/qwik/pull/8655","tags":["x_refsource_MISC"]},{"url":"https://github.com/QwikDev/qwik/commit/c1e7444402f9592b5cf9096e10bf303ab4640511","name":"https://github.com/QwikDev/qwik/commit/c1e7444402f9592b5cf9096e10bf303ab4640511","tags":["x_refsource_MISC"]},{"url":"https://github.com/QwikDev/qwik/releases/tag/@builder.io/qwik@1.20.0","name":"https://github.com/QwikDev/qwik/releases/tag/@builder.io/qwik@1.20.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-248","lang":"en","description":"CWE-248: Uncaught Exception","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-13T19:00:53.742Z"},"source":{"advisory":"GHSA-x586-xvc8-g7q6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-14T16:35:04.214453Z","id":"CVE-2026-84994","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-14T16:36:19.123Z"}}]}}}