Tag
#deserialization
GHSA-673q-mjm6-r5xr: Unauthenticated RCE in Next.js "use cache" Functions
GHSA-673q-mjm6-r5xr is rated Critical, CVSS v4.0 9.5, in the GitHub Advisory Database: an unauthenticated attacker can run code on a Next.js 16 server that uses App Router with Cache Components and has a use cache function returning multiple typed arrays. The database review classifies the flaw as deserialization of untrusted data (CWE-502) in the React Server Components transport protocol that Next.js bundles. Fixed in Next.js 16.4.1, with no workaround available.
Oct 23, 2026