How many CVEs have patched isInternalDevEndpoint?

1 published CVEs changed isInternalDevEndpoint in vercel/next.js, in 1 distinct patches totalling 4 changed lines, between 2026 and 2026.

What is the latest CVE that changed isInternalDevEndpoint?

CVE-2026-27977 (Next.js: null origin can bypass dev HMR websocket CSRF checks), published 2026-03-17, changed lines 34 to 53 of packages/next/src/server/lib/router-utils/block-cross-site-dev.ts.

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

vercel/next.js has 39 CVEs with a located fix in total; 1 of them changed isInternalDevEndpoint.

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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IsInternalDevEndpoint

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Next.js
IsInternalDevEndpoint

isInternalDevEndpoint in vercel/next.js: Patched by 1 CVEs

vercel/next.js

Function

isInternalDevEndpoint

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

packages/next/src/server/lib/router-utils/block-cross-site-dev.ts

Last patched March 17, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

isInternalDevEndpoint in vercel/next.js was changed by 1 published CVE fixes in 2026, in 1 distinct patches that added or removed 4 lines in total.

vercel/next.js has 39 CVEs with a located fix in total, so 3% of them touched this function.

CVEs that patched it

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

Next.js: null origin can bypass dev HMR websocket CSRF checks
CVE-2026-27977 · lines 34–53 · +2 −2 in 2 hunks
Low · CVSS 2.3
EPSS 0.2%2026-03-17

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Other functions in these files

Functions in the same file that CVE fixes also changed.

1isInternalEndpointpackages/next/src/server/lib/router-utils/block-cross-site-dev.ts2 CVEs · 1 patches2026

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 initialize2 CVEs · packages/next/src/server/lib/router-server.ts exportPageImpl2 CVEs · packages/next/src/export/worker.ts exportPagesPage2 CVEs · packages/next/src/export/routes/pages.ts

All patched functions in vercel/next.js

Frequently asked questions

Common questions about CVE fixes to isInternalDevEndpoint.

How many CVEs have patched isInternalDevEndpoint?: 1 published CVEs changed isInternalDevEndpoint in vercel/next.js, in 1 distinct patches totalling 4 changed lines, between 2026 and 2026.
What is the latest CVE that changed isInternalDevEndpoint?: CVE-2026-27977 (Next.js: null origin can bypass dev HMR websocket CSRF checks), published 2026-03-17, changed lines 34 to 53 of packages/next/src/server/lib/router-utils/block-cross-site-dev.ts.
How does isInternalDevEndpoint compare to the rest of vercel/next.js?: vercel/next.js has 39 CVEs with a located fix in total; 1 of them changed isInternalDevEndpoint.
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-utils/block-cross-site-dev.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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On this page

Overview
CVEs that patched it
Other functions in these files
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References