Vulnerability Description
Astro is a web framework for content-driven websites. From 7.0.0 until 7.0.6, the composable astro/hono pipeline installs security.checkOrigin only through the middleware() primitive, while actions() and pages() can dispatch to user code independently. Mounting actions() before middleware(), as in the examples/advanced-routing example and Cloudflare Hono documentation, allows cross-origin form-encoded action requests to execute before the origin check, and using pages() without middleware() drops the check for on-demand endpoints and pages. The flaw enables blind write-only cross-site request forgery using the victim's cookies against ActionHandler.handle and PagesHandler.handleWithErrorFallback when manifest.checkOrigin is enabled; the attacker can trigger a state-mutating action or endpoint handler but cannot read the cross-origin response. The default non-composable astro() pipeline is not affected. This issue is fixed in version 7.0.6.
Related Weaknesses (CWE)
References
- https://github.com/withastro/astro/commit/0b30b35f864310bee8485c952d1877e82e2b9b
- https://github.com/withastro/astro/pull/17250
- https://github.com/withastro/astro/releases/tag/[email protected]
- https://github.com/withastro/astro/security/advisories/GHSA-8mv7-9c27-98vc
FAQ
What is CVE-2026-73423?
CVE-2026-73423 is a documented vulnerability. Astro is a web framework for content-driven websites. From 7.0.0 until 7.0.6, the composable astro/hono pipeline installs security.checkOrigin only through the middleware() primitive, while actions() ...
How severe is CVE-2026-73423?
CVSS scoring is not yet available for CVE-2026-73423. Check NVD for updates.
Is there a patch for CVE-2026-73423?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.