{"cve":"CVE-2026-41248","nvd":{"published":"2026-04-24T21:16:18.497","modified":"2026-10-26T21:10:00.170","status":"Deferred","description":"Clerk JavaScript is the official JavaScript repository for Clerk authentication. createRouteMatcher in @clerk/nextjs, @clerk/nuxt, and @clerk/astro can be bypassed by certain crafted requests, allowing them to skip middleware gating and reach downstream handlers. This vulnerability is fixed in @clerk/astro 1.5.7, 2.17.10, and 3.0.15; @clerk/nextjs 5.7.6, 6.39.2, and 7.2.1; @clerk/nuxt 1.13.28 and 2.2.2; and @clerk/shared 2.22.1, 3.47.4, anc 4.8.1","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-436","CWE-863"],"references":["https://github.com/clerk/javascript/security/advisories/GHSA-vqx2-fgx2-5wq9"],"products":[],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-41248","score":0.00323,"percentile":0.25113,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-vqx2-fgx2-5wq9","url":"https://osv.dev/vulnerability/GHSA-vqx2-fgx2-5wq9","summary":"Official Clerk JavaScript SDKs: Middleware-based route protection bypass","modified":"2026-05-05T16:26:37.347726Z","packages":[{"ecosystem":"npm","name":"@clerk/nextjs","purl":"pkg:npm/%40clerk/nextjs","ranges":[">=5.0.0 <5.7.6"],"fixed":["5.7.6"]},{"ecosystem":"npm","name":"@clerk/nuxt","purl":"pkg:npm/%40clerk/nuxt","ranges":[">=1.1.0 <1.13.28"],"fixed":["1.13.28"]},{"ecosystem":"npm","name":"@clerk/astro","purl":"pkg:npm/%40clerk/astro","ranges":[">=0.0.1 <1.5.7"],"fixed":["1.5.7"]},{"ecosystem":"npm","name":"@clerk/shared","purl":"pkg:npm/%40clerk/shared","ranges":[">=2.20.17 <2.22.1"],"fixed":["2.22.1"]},{"ecosystem":"npm","name":"@clerk/nextjs","purl":"pkg:npm/%40clerk/nextjs","ranges":[">=6.0.0-snapshot.vb87a27f <6.39.2"],"fixed":["6.39.2"]},{"ecosystem":"npm","name":"@clerk/nextjs","purl":"pkg:npm/%40clerk/nextjs","ranges":[">=7.0.0 <7.2.1"],"fixed":["7.2.1"]},{"ecosystem":"npm","name":"@clerk/nuxt","purl":"pkg:npm/%40clerk/nuxt","ranges":[">=2.0.0 <2.2.2"],"fixed":["2.2.2"]},{"ecosystem":"npm","name":"@clerk/astro","purl":"pkg:npm/%40clerk/astro","ranges":[">=2.0.0-snapshot.v20241206174604 <2.17.10"],"fixed":["2.17.10"]},{"ecosystem":"npm","name":"@clerk/astro","purl":"pkg:npm/%40clerk/astro","ranges":[">=3.0.0 <3.0.15"],"fixed":["3.0.15"]},{"ecosystem":"npm","name":"@clerk/shared","purl":"pkg:npm/%40clerk/shared","ranges":[">=3.0.0-canary.v20250225091530 <3.47.4"],"fixed":["3.47.4"]},{"ecosystem":"npm","name":"@clerk/shared","purl":"pkg:npm/%40clerk/shared","ranges":[">=4.0.0 <4.8.1"],"fixed":["4.8.1"]}]}],"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."]}