{"cve":"CVE-2026-106104","nvd":{"published":"2026-10-06T18:16:51.687","modified":"2026-10-09T02:16:57.307","status":"Awaiting Analysis","description":"Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to 2.23.3, Platform.parseSSR() passed an unbounded User-Agent request header to getMatch() in ui/src/plugins/platform/Platform.js, whose browser-detection expressions combined greedy captures with repeated unbounded scans. Platform belongs to autoInstalledPlugins, so this parsing occurs before routing for every SSR request. A crafted unauthenticated request containing repeated version tokens without a terminating Safari token causes super-linear backtracking and blocks the Node.js event loop, delaying every other SSR request. SPA, PWA, Electron, Cordova, Capacitor, browser-extension, and static-site-generation targets are not affected because they do not parse an attacker-controlled request header through this path. This issue is fixed in version 2.23.3.","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":8.7},"cvss_v3":null,"cwes":["CWE-1333"],"references":["https://github.com/quasarframework/quasar/commit/7a954ddafa756afe95c8f633f48ed68a07209d3d","https://github.com/quasarframework/quasar/releases/tag/quasar-v2.23.3","https://github.com/quasarframework/quasar/security/advisories/GHSA-68jq-fhch-4xq4","https://github.com/quasarframework/quasar/security/advisories/GHSA-68jq-fhch-4xq4"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-106104","score":0.0037,"percentile":0.30699,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-68jq-fhch-4xq4","url":"https://osv.dev/vulnerability/GHSA-68jq-fhch-4xq4","summary":"Quasar Framework: Super-linear regex backtracking on User-Agent lets one request stall a Quasar SSR server","modified":"2026-10-07T16:30:05.686485388Z","packages":[{"ecosystem":"npm","name":"quasar","purl":"pkg:npm/quasar","ranges":["<2.23.3"],"fixed":["2.23.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}