Next.js: Denial of Service in App Router using Server Actions

[ Description ]Official description

Next.js is a React framework for building full-stack web applications. From 13.0.0 until 15.5.28 and 16.4.1, crafted requests targeting App Router applications with at least one Server Action can cause excessive CPU consumption and block processing of further requests in the same process. Applications using the Pages Router and App Router applications without Server Actions are not affected. This issue is fixed in versions 15.5.28 and 16.4.1.

[ Fixes ]Fixes and patches

• next 15.5.28Fixed version · GitHub Advisories · npm package next: upgrade to 15.5.28 or later (affected >= 13.0.0, <= 15.5.27)
• next 16.4.1Fixed version · GitHub Advisories · npm package next: upgrade to 16.4.1 or later (affected >= 16.0.0, <= 16.4.0)

[ Packages ]Affected open-source packages

• next npmAffected >= 13.0.0, <= 15.5.27 · fixed in 15.5.28 · GHSA-p3m5-59mp-jv5r
• next npmAffected >= 16.0.0, <= 16.4.0 · fixed in 16.4.1 · GHSA-p3m5-59mp-jv5r

[ References ]References

• github.com/vercel/next.js/releases/tag/v15.5.28
• github.com/vercel/next.js/releases/tag/v16.4.1
• github.com/vercel/next.js/security/advisories/GHSA-p3m5-59mp-jv5r