脆弱性・アップデート
10月23日(金)
Next.js: Unauthenticated Remote Code Execution in `use cache` functions returning typed arrays
影響: npm:next >= 16.0.0, <= 16.4.0 → 16.4.1 A vulnerability in applications using App router with Cache Component can lead to remote code execution. The application needs to have a use cache function that returns multiple typed arrays. Workaround There is no known workaround for affected applications with such use cache functions. You should upgrade immediately even if your application does not have similar functions.
Sentry-Javascript: Middleware Bypass when using Tunnel route
影響: npm:@sentry/nextjs >= 9.36.0, < 9.47.2 → 9.47.2, npm:@sentry/nextjs >= 10.0.0-alpha.0, < 10.75.2 → 10.75.2, npm:@sentry/nextjs >= 11.0.0-alpha.0, < 11.0.0-rc.1 → 11.0.0-rc.1 The tunnelRoute option makes the SDK send browser events to a path on your own Next.js server (for example /monitoring), where a rewrite forwards them to Sentry to prevent ad blockers from blocking them. To keep those envelope requests from being rejected by your middleware, the SDK skips middleware for them. The middleware skip was wider than the rewrite. The rewrite only serves requests to the tunnel path itself with the o and p parameters set. The skip applied to anything under the tunnel pa…
Next.js: Unauthenticated Remote Code Execution in Image Optimization API when SVG files are used
影響: npm:next >= 10.0.0, <= 15.5.27 → 15.5.28, npm:next >= 16.0.0, <= 16.4.0 → 16.4.1 A memory-related vulnerability has been discovered in an upstream library used for Image Optimization can lead to possible remote code execution (RCE) when Next.js runs on glibc-based Linux. Workaround Ensure the version of sharp used by Next.js is greater than or equal to 0.35.5. Fresh installs automatically get a fixed version of sharp. Upgrading Next.js to the patched versions will ensure package managers automatically provide a fixed version of sharp to Next.js.
Next.js: Denial of Service in App Router using Server Actions
影響: npm:next >= 13.0.0, <= 15.5.27 → 15.5.28, npm:next >= 16.0.0, <= 16.4.0 → 16.4.1 Crafted requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further requests in the same process. Workarounds No workaround exists besides upgrading. Applications using Pages Router or not using Server Actions are not vulnerable.
10月9日(金)
Upcoming Next.js Security Update for Upstream Vulnerabilities
Next.js plans to publish an out-of-band security update next Wednesday, October 14, 2026, addressing two Critical and one High severity vulnerabilities in upstream dependencies.
9月23日(水)
Next.js Security Update for a Critical Upstream Issue
The September 22, 2026 out-of-band security update for Next.js is now available
Upcoming Next.js Security Update for a Critical Upstream Issue
Next.js 16.3.6 and 15.5.26 are planned for a critical out-of-band security update on September 22, 2026.
12月12日(金)
React / Next.js Denial-of-Service Vulnerability: Deno Deploy users protected
A high severity Denial-of-Service (DoS) vulnerability has been found in React Server Components and Next.js. Deno has implemented mitigations in Deno Deploy. Immediate upgrades are required for other users.
12月4日(木)
Security Advisory: CVE-2025-66478
A critical vulnerability (CVE-2025-66478) has been identified in the React Server Components protocol. Users should upgrade to patched versions immediately.
React Server Functions / Next.js Vulnerability: Deno Deploy users protected
A critical Remote Code Execution (RCE) vulnerability has been found in React Server Functions and Next.js. Deno has implemented mitigations in Deno Deploy. Immediate upgrades are required for other users.