{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.23.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7a954ddafa756afe95c8f633f48ed68a07209d3d"
            },
            {
              "fixed": "db082a4407936be7865c7c85dd1862bb213f0c08"
            }
          ],
          "repo": "https://github.com/quasarframework/quasar",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-68jq-fhch-4xq4"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106104.json"
  },
  "details": "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.",
  "id": "CVE-2026-106104",
  "modified": "2026-10-09T10:30:56.613631755Z",
  "published": "2026-10-06T17:14:45.817Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/quasarframework/quasar/releases/tag/quasar-v2.23.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106104.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/quasarframework/quasar/security/advisories/GHSA-68jq-fhch-4xq4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-106104"
    },
    {
      "type": "FIX",
      "url": "https://github.com/quasarframework/quasar/commit/7a954ddafa756afe95c8f633f48ed68a07209d3d"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Quasar Framework: Super-linear regex backtracking on User-Agent lets one request stall a Quasar SSR server"
}