CVE-2026-84376

Summary

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 Software

Weaknesses

• CWE-187: CWE-187: Partial String Comparison

References

• https://github.com/withastro/astro/security/advisories/GHSA-376h-93r7-7g6f
• 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

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