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GHSA-8gvc-j273-4wm5

Vitest browser mode serves arbitrary files

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-24963

Packages

EcosystemPackageAffectedFixed in
npm @vitest/browser >= 2.0.4, < 2.1.9 2.1.9
npm @vitest/browser >= 3.0.0, < 3.0.4 3.0.4

Details

As written in the advisory (Markdown source, shown as plain text).

### 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`](https://vitest.dev/guide/browser/config.html#browser-api), 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`](https://vitest.dev/guide/browser/config.html#browser-api) may get any files exposed.

References

External links from the advisory. They lead to third-party sites.