{"id":"EUVD-2026-99978","revision":null,"records":[{"revision":"71e9b12e3a5a4fe39c0294f6a3f6c28f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-84994","aliases":[],"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.","state":0,"publishedAt":"2026-10-13T19:00:53.742+00:00","modifiedAt":"2026-10-14T16:36:19.123+00:00","affected":[{"ecosystem":"Vendor product","name":"qwik","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"QwikDev\",\n                    \"product\": \"qwik\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.0.0-beta37\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"qwik","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"@builder.io\",\n                    \"product\": \"qwik\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.20.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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","score":8.7,"severity":"HIGH"}],"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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-84994","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-84994","identifiers":["CVE-2026-84994"]},"retained":false,"historicalAffected":[]},{"revision":"956f610258504d49a2a5124d51541177","observedAt":"2026-11-07T15:22:28.604+00:00","statement":{"source":"euvd","id":"EUVD-2026-99978","aliases":["CVE-2026-84994","GHSA-x586-xvc8-g7q6"],"title":"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.reso…","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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 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","score":8.7,"severity":null}],"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"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-99978","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 13, 2026, 7:00:53 PM","dateUpdated":"Oct 14, 2026, 4:36:19 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-99978","identifiers":["EUVD-2026-99978","CVE-2026-84994","GHSA-x586-xvc8-g7q6"]},"retained":false,"historicalAffected":[]},{"revision":"3250c4f963a141c3a6f06f908b9eb7f2","observedAt":"2026-10-25T16:19:16.24+00:00","statement":{"source":"nvd","id":"CVE-2026-84994","aliases":[],"title":"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.reso…","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.","state":0,"publishedAt":"2026-10-13T19:20:52.743+00:00","modifiedAt":"2026-10-14T17:19:46.043+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":8.7,"severity":"HIGH"}],"references":["https://github.com/QwikDev/qwik/commit/c1e7444402f9592b5cf9096e10bf303ab4640511","https://github.com/QwikDev/qwik/pull/8655","https://github.com/QwikDev/qwik/releases/tag/@builder.io/qwik@1.20.0","https://github.com/QwikDev/qwik/security/advisories/GHSA-x586-xvc8-g7q6"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84994","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-248"],"productCriteria":[],"sourceDates":{"published":"2026-10-13T19:20:52.743","lastModified":"2026-10-14T17:19:46.043"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-84994","identifiers":["CVE-2026-84994"]},"retained":false,"historicalAffected":[]},{"revision":"79eb5925fb2c484abc97668e2a539d8f","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-x586-xvc8-g7q6","aliases":["CVE-2026-84994"],"title":"Qwik: Crashing any Qwik Server via Resource thenable","description":"### 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.","state":0,"publishedAt":"2026-10-15T20:22:00+00:00","modifiedAt":"2026-10-15T20:30:03.9507415+00:00","affected":[{"ecosystem":"npm","name":"@builder.io/qwik","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.20.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@qwik.dev/core","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.0.0-beta37"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","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","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/QwikDev/qwik/security/advisories/GHSA-x586-xvc8-g7q6","https://nvd.nist.gov/vuln/detail/CVE-2026-84994","https://github.com/QwikDev/qwik/pull/8655","https://github.com/QwikDev/qwik/commit/c1e7444402f9592b5cf9096e10bf303ab4640511","https://github.com/QwikDev/qwik","https://github.com/QwikDev/qwik/releases/tag/@builder.io/qwik@1.20.0"],"sourceUrl":"https://github.com/advisories/GHSA-x586-xvc8-g7q6","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-x586-xvc8-g7q6","identifiers":["GHSA-x586-xvc8-g7q6","CVE-2026-84994"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T14:04:00.1516715+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-09T14:04:00.1516715+00:00","lastSuccessAt":"2026-11-09T14:04:00.2969466+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:04:00.2969495+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-63bead6b33209140263fb436f2f7924cdf0a57ddb97fc634114a22ac37965cfc","complete":true,"records":421444,"lastAttemptAt":"2026-11-09T14:02:14.5012261+00:00","lastSuccessAt":"2026-11-09T14:02:14.4549407+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:02:14.5012261+00:00","snapshotPublishedAt":"2026-11-09T13:24:52+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. 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