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fix(@angular/build): pass process environment variables to prerender workers#32731

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alan-agius4:prerender-env
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fix(@angular/build): pass process environment variables to prerender workers#32731
alan-agius4 wants to merge 1 commit intoangular:mainfrom
alan-agius4:prerender-env

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Worker processes used for prerendering and route extraction now inherit process.env. This ensures that any custom environment variables required by the application are available during the server-side rendering process.

Closes #32730

@alan-agius4 alan-agius4 added the target: patch This PR is targeted for the next patch release label Mar 10, 2026
@alan-agius4 alan-agius4 requested a review from clydin March 10, 2026 11:16
@alan-agius4 alan-agius4 added the action: review The PR is still awaiting reviews from at least one requested reviewer label Mar 10, 2026
@alan-agius4 alan-agius4 changed the title fix(angular/build): pass process environment variables to prerender workers fix(@angular/build): pass process environment variables to prerender workers Mar 10, 2026
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Code Review

This pull request aims to ensure worker processes inherit "process.env" for prerendering and route extraction, making custom environment variables available. However, a significant security vulnerability has been identified: passing the entire "process.env" to worker threads risks exposing sensitive build-time secrets (e.g., API keys, tokens) if they are inadvertently rendered into static HTML files. It is crucial to implement a filtering mechanism to pass only necessary environment variables, adhering to the principle of least privilege.

…workers

Worker processes used for prerendering and route extraction now inherit `process.env`. This ensures that any custom environment variables required
by the application are available during the server-side rendering process.

Closes angular#32730
@alan-agius4 alan-agius4 removed the request for review from clydin March 10, 2026 21:02
@alan-agius4 alan-agius4 added action: merge The PR is ready for merge by the caretaker and removed action: review The PR is still awaiting reviews from at least one requested reviewer labels Mar 10, 2026
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action: merge The PR is ready for merge by the caretaker area: @angular/build target: patch This PR is targeted for the next patch release

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Strict host header validation breaks route extraction

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