chore(security): bump next to ^15.5.16 for CVE-2026-44578#1
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CVE-2026-44578 — Next.js WebSocket upgrade SSRF (CVSS 8.6). Affected: self-hosted Next.js 13.4.13+, 14.x, 15.x <15.5.16, 16.0.0–16.2.4. This bump moves package.json from ^15.3.1 to ^15.5.16.
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Summary
Bumps Next.js to ^15.5.16 to patch CVE-2026-44578 — an unauthenticated WebSocket-upgrade SSRF (CVSS 8.6) that lets attackers proxy GET requests through the Next.js server to internal hosts on port 80 (e.g. cloud metadata endpoints). Affects self-hosted Next.js only.
Affected ranges:
>=13.4.13through 14.x,>=15.0.0 <15.5.16,>=16.0.0 <16.2.5.Previous resolved version:
15.5.14→15.5.18(resolved against^15.5.16).Test plan
pnpm build/npm run build) succeeds