Cross-site Request Forgery (CSRF) Affecting astro package, versions >=7.0.0 <7.0.6
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published21 Jul 2026
- disclosed20 Jul 2026
- creditJared Gore
Introduced: 20 Jul 2026
CVE-2026-73423 (opens in a new tab)How to fix?
Upgrade astro to version 7.0.6 or higher.
Overview
astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind.
Affected versions of this package are vulnerable to Cross-site Request Forgery (CSRF) via the security.checkOrigin logic when middleware() is absent or mounted after actions() or pages() in the composable pipeline. An attacker can perform unauthorized state-changing actions on behalf of a user by sending crafted cross-origin requests that bypass origin checks.
Note: This is only exploitable if the composable pipeline is used with either actions() mounted before middleware() or pages() used without middleware().
Workaround
This vulnerability can be mitigated by ensuring middleware() is mounted before both actions() and pages() in the composable pipeline, and that it is always included even when no custom middleware logic is needed.