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A little more context for your next update.

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next: 15.5.16 → 15.5.18 · Semverse

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next

The React Framework

Latest 16.3.63,960 published versionsvercel/next.js

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1 release to review

7 May 2026 · Newest first

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Last checked 26 Sept 2026, 23:42 UTC

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15.5.18

7 May 2026GitHub Release

This release contains security fixes for the following advisories:

High:

GHSA-8h8q-6873-q5fj: Denial of Service with Server Components
GHSA-267c-6grr-h53f: Middleware / Proxy bypass in App Router applications via segment-prefetch routes

Signals highlight changes worth reviewing. They cannot determine whether your application is affected.

GHSA-26hh-7cqf-hhc6: Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up

GHSA-mg66-mrh9-m8jx: Denial of Service via connection exhaustion in applications using Cache Components

GHSA-492v-c6pp-mqqv: Middleware / Proxy bypass through dynamic route parameter injection

GHSA-c4j6-fc7j-m34r: Server-side request forgery in applications using WebSocket upgrades

GHSA-36qx-fr4f-26g5: Middleware / Proxy bypass in Pages Router applications using i18n

Moderate:

GHSA-ffhc-5mcf-pf4q: Cross-site scripting in App Router applications using CSP nonces
GHSA-gx5p-jg67-6x7h: Cross-site scripting in beforeInteractive scripts with untrusted input
GHSA-h64f-5h5j-jqjh: Denial of Service in the Image Optimization API
GHSA-wfc6-r584-vfw7: Cache poisoning in React Server Component responses

Low:

GHSA-vfv6-92ff-j949: Cache poisoning via collisions in React Server Component cache-busting
GHSA-3g8h-86w9-wvmq: Middleware / Proxy redirects can be cache-poisoned