CVE-2026-27979

描述

## Summary A request containing the `next-resume: 1` header (corresponding with a PPR resume request) would buffer request bodies without consistently enforcing `maxPostponedStateSize` in certain setups. The previous mitigation protected minimal-mode deployments, but equivalent non-minimal deployments remained vulnerable to the same unbounded postponed resume-body buffering behavior. ## Impact In applications using the App Router with Partial Prerendering capability enabled (via `experimental.ppr` or `cacheComponents`), an attacker could send oversized `next-resume` POST payloads that were buffered without consistent size enforcement in non-minimal deployments, causing excessive memory usage and potential denial of service. ## Patches Fixed by enforcing size limits across all postponed-body buffering paths and erroring when limits are exceeded. ## Workarounds If upgrade is not immediately possible: - Block requests containing the `next-resume` header, as this is never valid to be sent from an untrusted client.

如何修補 CVE-2026-27979

要修補 CVE-2026-27979,請將受影響套件升級到下列已修補版本。

• —升級至 16.1.7 或更新版本

CVE-2026-27979 正在被利用嗎?

低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 16.0.1, < 16.1.7

CVSS 分數

參考連結(5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-27979
• PATCHgithub.com/vercel/next.js
• WEBgithub.com/vercel/next.js/commit/c885d4825f800dd1e49ead37274dcd08cdd6f3f1
• WEBgithub.com/vercel/next.js/releases/tag/v16.1.7