{"id":"CVE-2026-106104","revision":"a458f476de934ac3adc36dfcccd00b65","records":[{"revision":"a458f476de934ac3adc36dfcccd00b65","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-106104","aliases":[],"title":"Quasar Framework: Super-linear regex backtracking on User-Agent lets one request stall a Quasar SSR server","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.","state":0,"publishedAt":"2026-10-06T17:14:45.817+00:00","modifiedAt":"2026-10-09T01:18:50.675+00:00","affected":[{"ecosystem":"Vendor product","name":"quasar","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"quasarframework\",\n                    \"product\": \"quasar\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.23.3\",\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/quasarframework/quasar/security/advisories/GHSA-68jq-fhch-4xq4","https://github.com/quasarframework/quasar/commit/7a954ddafa756afe95c8f633f48ed68a07209d3d","https://github.com/quasarframework/quasar/releases/tag/quasar-v2.23.3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106104","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-106104","identifiers":["CVE-2026-106104"]},"retained":false,"historicalAffected":[]}],"coverage":[]}