Next.js released an out-of-band security update fixing two remote code execution flaws and a denial-of-service bug.
The RCE issues involve React Server Components in version 16 apps and a memory bug in librsvg via the sharp package on Linux.
Vercel rated both RCE issues with a CVSS score of 9.5.
Fixes are available in versions 16.4.1 and 15.5.28.
No public reports of active exploitation have been confirmed so far.