{"cve":"CVE-2026-84376","nvd":{"published":"2026-09-02T17:18:00.497","modified":"2026-09-09T21:04:42.813","status":"Deferred","description":"Astro is a web framework for content-driven websites. Prior to 7.2.4, Astro stripped a configured non-root base path from request pathnames using a string-prefix check without verifying a path-segment boundary. With base \"/app\", a request to \"/appX/admin\" resolved internally to the protected \"/admin\" route while middleware observed \"/appX/admin\" in context.url.pathname. In applications that authorize base-prefixed routes by inspecting context.url.pathname, an unauthenticated remote attacker could bypass pathname-based middleware authorization and reach protected routes. This issue is fixed in version 7.2.4.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.3},"cvss_v3":null,"cwes":["CWE-187"],"references":["https://github.com/withastro/astro/commit/05763a0884aabb1da78a2749d5bb9d41ae620527","https://github.com/withastro/astro/pull/17701","https://github.com/withastro/astro/releases/tag/astro@7.2.4","https://github.com/withastro/astro/security/advisories/GHSA-376h-93r7-7g6f"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-84376","score":0.00707,"percentile":0.53424,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-376h-93r7-7g6f","url":"https://osv.dev/vulnerability/GHSA-376h-93r7-7g6f","summary":"Astro: Authorization bypass from missing path-segment boundary check when stripping the configured base","modified":"2026-09-08T21:30:04.767703624Z","packages":[{"ecosystem":"npm","name":"astro","purl":"pkg:npm/astro","ranges":["<7.2.4"],"fixed":["7.2.4"]}]}],"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."]}