GHSA-8gvc-j273-4wm5 Vitest browser mode serves arbitrary files

• npm @vitest/browser: >= 2.0.4, < 2.1.9 → fixed in 2.1.9 • npm @vitest/browser: >= 3.0.0, < 3.0.4 → fixed in 3.0.4

Summary `__screenshot-error` handler on the browser mode HTTP server that responds any file on the file system. Especially if the server is exposed on the network by `browser.api.host: true`, an attacker can send a request to that handler from remote to get the content of arbitrary files. Details This `__screenshot-error` handler on the browser mode HTTP server responds any file on the file system. https://github.com/vitest-dev/vitest/blob/f17918a79969d27a415f70431e08a9445b051e45/packages/browser/src/node/plugin.ts#L88-L130 This code was added by https://github.com/vitest-dev/vitest/commit/2d62051f13b4b0939b2f7e94e88006d830dc4d1f. PoC 1. Create a directory and change the current directory to that directory 1. Run `npx vitest init browser` 1. Run `npm run test:browser` 2. Run `curl http://localhost:63315/__screenshot-error?file=/path/to/any/file` Impact Users explicitly exposing the browser mode server to the network by `browser.api.host: true` may get any files exposed.