GHSA-38R7-794H-5758 webpack buildHttp HttpUriPlugin allowedUris bypass via HTTP redirects → SSRF + cache persistence

Summary When experiments.buildHttp is enabled, webpack’s HTTPS resolver HttpUriPlugin enforces allowedUris only for the initial URL, but does not re-validate allowedUris after following HTTP 30x redirects. As a result, an import that appears restricted to a trusted allow-list can be redirected to...

PT-2026-6641

Name of the Vulnerable Software and Affected Versions Webpack versions 5.49.0 through 5.104.0 Description Webpack’s HTTPS resolver HttpUriPlugin can be bypassed when the experiments.buildHttp feature is enabled. This bypass allows fetching resources from hosts outside of the allowedUris...