
A critical vulnerability in React Server Components affecting React 19 (CVE-2025-55182) and frameworks that use it like Next.js (CVE-2025-66478).
<a href=https://aws.amazon.com/security/security-bulletins/rss/aws-2025-030>CVE-2025-66478 is the corresponding RCE vulnerability in Next.js, which inherits the same underlying flaw through its implementation of the RSC "Flight" protocol.