medium6.3
CVE-2026-84376
Astro: Authorization bypass from missing path-segment boundary check when stripping the configured base
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | astro | <= 7.2.3 | 7.2.4 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-376h-93r7-7g6f
- https://github.com/withastro/astro/security/advisories/GHSA-376h-93r7-7g6f
- https://nvd.nist.gov/vuln/detail/CVE-2026-84376
- https://github.com/withastro/astro/pull/17701
- https://github.com/withastro/astro/commit/05763a0884aabb1da78a2749d5bb9d41ae620527
- https://github.com/withastro/astro/releases/tag/astro@7.2.4