[BUG] overrides for a transitive dependency are dropped when it is reached through a file:/workspace link #9659

Is there an existing issue for this?

• I have searched the existing issues

This issue exists in the latest npm version

• I am using the latest npm

This is not just a request to bump a dependency for a CVE

• This is not solely a request to bump a dependency for a CVE

Current Behavior

A root overrides entry that targets a transitive dependency is silently ignored when the path to that dependency crosses a file: (or workspace) link boundary.
The transitive dependency is installed at its original, un-overridden version, and the lockfile records that wrong version.
No warning or error is emitted.

Given a root that depends on a local package via file:, where the local package pulls a registry dependency with its own transitive dependency, an override on the transitive dependency has no effect.

// package.json
{
  "name": "root",
  "version": "1.0.0",
  "dependencies": { "a": "file:./pkgs/a" },
  "overrides": { "brace-expansion": "2.0.1" }
}

// pkgs/a/package.json
{ "name": "a", "version": "1.0.0", "dependencies": { "glob": "7.2.0" } }

After npm install, the lockfile pins brace-expansion@1.1.15 instead of the overridden 2.0.1:

node_modules/brace-expansion => 1.1.15   // WRONG, override ignored

The same wrong result occurs under both install-strategy=hoisted and install-strategy=linked, so this is not specific to the linked strategy.

For contrast, the identical override works when the dependency chain does NOT cross a link boundary.
Declaring glob as a direct dependency of the root (instead of via the file: package) correctly pins brace-expansion@2.0.1.

Expected Behavior

The override should apply regardless of whether the overridden dependency is reached through a file:/workspace link.
brace-expansion should be installed and locked at 2.0.1, matching the behavior when the same dependency is reached without crossing a link boundary, and matching the hoisted/registry-only result.

Steps To Reproduce

1. Create a project whose package.json declares "dependencies": { "a": "file:./pkgs/a" } and "overrides": { "brace-expansion": "2.0.1" }.
2. Create pkgs/a/package.json with "dependencies": { "glob": "7.2.0" } (glob pulls minimatch which depends on brace-expansion@^1.1.7).
3. Run npm install.
4. Inspect the installed/locked brace-expansion version: it is 1.1.15, not the overridden 2.0.1.
5. Replace the file: dependency with a direct "glob": "7.2.0" dependency on the root and reinstall: brace-expansion is now correctly 2.0.1.

Environment

• npm: 12.0.0-pre.1 (latest branch)
• Node.js: v24.17.0
• OS Name: macOS (Darwin 25.5.0)
• System Model Name: Mac17,6
• npm config:

install-strategy = hoisted   ; also reproduces with linked