How many CVEs have patched initialize?

2 published CVEs changed initialize in vercel/next.js, in 3 distinct patches totalling 15 changed lines, between 2025 and 2026.

What is the latest CVE that changed initialize?

CVE-2026-27977 (Next.js: null origin can bypass dev HMR websocket CSRF checks), published 2026-03-17, changed lines 358 to 818 of packages/next/src/server/lib/router-server.ts.

How does initialize compare to the rest of vercel/next.js?

vercel/next.js has 39 CVEs with a located fix in total; 2 of them changed initialize.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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Patched Functions
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Next.js
Initialize

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Patched Functions
Vercel
Next.js
Initialize

initialize in vercel/next.js: Patched by 2 CVEs

vercel/next.js

Function

initialize

Name: initialize in vercel/next.js: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

packages/next/src/server/lib/router-server.ts

Last patched March 17, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2025–2026

Years

By CVE publication date

Overview

initialize in vercel/next.js was changed by 2 published CVE fixes between 2025 and 2026, in 3 distinct patches that added or removed 15 lines in total.

vercel/next.js has 39 CVEs with a located fix in total, so 5% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed initialize, newest first, with the lines each fix touched.

Next.js: null origin can bypass dev HMR websocket CSRF checks
CVE-2026-27977 · lines 358–818 · +2 −2 in 2 hunks
Low · CVSS 2.3
EPSS 0.2%2026-03-17
Authorization Bypass in Next.js Middleware
CVE-2025-29927 · lines 169–175 · +7 −4
Critical · CVSS 9.1
EPSS 99.2%2025-03-21

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Other hotspots in the repository

Functions in vercel/next.js changed by the most CVE fixes.

createRedirectRenderResult2 CVEs · packages/next/src/server/app-render/action-handler.ts createPatchedFetcher2 CVEs · packages/next/src/server/lib/patch-fetch.ts handleAction2 CVEs · packages/next/src/server/app-render/action-handler.ts exportPageImpl2 CVEs · packages/next/src/export/worker.ts exportPagesPage2 CVEs · packages/next/src/export/routes/pages.ts join2 CVEs · packages/next/src/export/worker.ts

All patched functions in vercel/next.js

Frequently asked questions

Common questions about CVE fixes to initialize.

How many CVEs have patched initialize?: 2 published CVEs changed initialize in vercel/next.js, in 3 distinct patches totalling 15 changed lines, between 2025 and 2026.
What is the latest CVE that changed initialize?: CVE-2026-27977 (Next.js: null origin can bypass dev HMR websocket CSRF checks), published 2026-03-17, changed lines 358 to 818 of packages/next/src/server/lib/router-server.ts.
How does initialize compare to the rest of vercel/next.js?: vercel/next.js has 39 CVEs with a located fix in total; 2 of them changed initialize.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

packages/next/src/server/lib/router-server.ts on GitHub (opens in a new tab)
All patched functions in vercel/next.js
Patched functions directory

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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