Next.jsに脆弱性（CVE-2026-94484）
概要
Next.jsに脆弱性が確認されました。
バージョン 16.0.0 以上 16.3.8 未満、15.0.0 以上 15.5.27 未満に影響があります。
修正版 16.3.8 / 15.5.27 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-94484 GHSA-mcj8-r9mp-w47p |
|---|---|
| 脆弱性の種類 | CWE-524 |
| 危険度 | 中 |
| CVSSスコア |
6.3（CVSS v4.0） CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| 公開日 | 2026年10月7日 |
影響を受ける製品
| 製品 | 影響を受けるバージョン | 修正版 | 出典 |
|---|---|---|---|
| Next.js |
16.0.0 以上 16.3.8 未満、15.0.0 以上 15.5.27 未満 | 16.3.8 / 15.5.27 | OSV.dev |
推奨対応
- Next.jsを、ご利用中の系列に対応する修正版（16.3.8 / 15.5.27）またはそれ以降の公式最新版へ更新してください。
情報元の原文
OSV.dev
Next.js has cache poisoning in SSG/ISR rendering that leads to cross-user content substitution and persistent denial of service
Next.js applications that use a root-level catch-all page together with statically generated or Incremental Static Regeneration routes can have their shared response cache poisoned by a single unauthenticated crafted request.
利用条件：CC BY 4.0
出典: GitHub Advisory Database（OSV.dev 経由で取得）。原文のまま掲載（改変なし）
NVD（National Vulnerability Database / NIST）
Next.js is a React framework for building full-stack web applications. From 15.0.0 until 15.5.27 and 16.3.8, applications with a root-level catch-all page and statically generated or Incremental Static Regeneration routes can use a shared response cache key that is insufficiently scoped to the source route. A single unauthenticated crafted request can poison that cache, causing cross-user content substitution or persistent denial of service until the poisoned entry is revalidated or replaced. This issue is fixed in versions 15.5.27 and 16.3.8.
利用条件：米国政府の著作物（パブリックドメイン）・原文のまま掲載
Copyright 1999-2026 The MITRE Corporation
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
CVE List（CVE Program）
Next.js: Cache poisoning in Next.js SSG/ISR rendering leads to cross-user content substitution and persistent denial of service
Next.js is a React framework for building full-stack web applications. From 15.0.0 until 15.5.27 and 16.3.8, applications with a root-level catch-all page and statically generated or Incremental Static Regeneration routes can use a shared response cache key that is insufficiently scoped to the source route. A single unauthenticated crafted request can poison that cache, causing cross-user content substitution or persistent denial of service until the poisoned entry is revalidated or replaced. This issue is fixed in versions 15.5.27 and 16.3.8.
利用条件：CVE の利用条件（CVE Terms of Use）・原文のまま掲載
Copyright 1999-2026 The MITRE Corporation
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
情報元
- OSV.dev
https://github.com/advisories/GHSA-mcj8-r9mp-w47p - NVD（National Vulnerability Database / NIST）
https://nvd.nist.gov/vuln/detail/CVE-2026-94484 - CVE List（CVE Program）
https://www.cve.org/CVERecord?id=CVE-2026-94484