fix(@angular/ssr): ensure public directory containment in CommonEngine - #33957
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This pull request improves the path traversal protection in the Angular SSR CommonEngine. It replaces the previous startsWith(normalize(publicPath)) check with a more robust check using relative and isAbsolute from node:path, which is executed before attempting to read any pre-rendered pages. I have no feedback to provide as there are no review comments.
Ensure that paths resolved in `retrieveSSGPage` strictly remain within the configured `publicPath` by checking `relative()` containment before evaluating the static file. Previously, a string `startsWith()` check was used, which could match sibling directories that share the same name prefix as `publicPath`.
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Ensure that paths resolved in
retrieveSSGPagestrictly remain within the configuredpublicPathby checkingrelative()containment before evaluating the static file.Previously, a string
startsWith()check was used, which could match sibling directories that share the same name prefix aspublicPath.