Update dependency vitest to v3.2.6 [SECURITY]#649
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This PR contains the following updates:
3.2.4→3.2.6When Vitest UI server is listening, arbitrary file can be read and executed
CVE-2026-47429 / GHSA-5xrq-8626-4rwp
More information
Details
Summary
Arbitrary file can be read on Windows when Vitest UI server is listening, especially when exposed to the network.
Impact
Only users that match either of the following conditions are affected:
--api.hostorapi.hostconfig option)Details
The API handler for
/__vitest_attachment__uses the deprecatedisFileServingAllowedincorrectly.https://github.com/vitest-dev/vitest/blob/eb1abf08573032a532015b999ad3501c5e89e3bb/packages/ui/node/index.ts#L77
The function expects the passed value to use
cleanUrlafter the check before file system related operation.Because of this, it is possible to bypass the check by
\\?\\..\\. This is not possible on Linux as Linux errors if a directory named?does not exist.A similar problem exists in other places as well.
That said, this
isFileServingAllowedcheck does not actually prevent the API to be abused. Since the API has rerun feature and file write feature, it's possible to run arbitrary script by writing a script as a test file usingsaveTestFileand running it usingrerun. This means exposing the API / Vitest UI is equivalent to giving script execution access.On the browser mode side, there're
readFile/writeFile/saveSnapshotFile. So exposing the browser mode is equivalent to giving file read / write access.PoC
curl http://localhost:51204/__vitest__/curl "http://localhost:51204/__vitest_attachment__?path=C:\\path\\to\\project\\?\\..\\..\\secret.txt&contentType=text/plain&token=$TOKEN"(TOKEN is the API token)secret.txtthat is outside the project directoryMitigations
Vitest now ships two configuration flags,
allowWriteandallowExec, that gate the privileged operations exploited by this vulnerability. Both are disabled by default whenever the API server is bound to a non-localhosthost, ensuring that exposing the server to the network no longer implicitly grants write or execute capabilities to remote clients.When these flags are disabled, the UI also enters a read-only mode: in-browser code editing and test file execution are turned off, removing the attack surface that allowed remote code execution. Many Browser Mode features are also disabled, like attachments, artifacts or snapshots. See
browser.api.Users who require the full interactive UI on a networked host must explicitly opt in by setting
allowWriteand/orallowExectotrue.Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
vitest-dev/vitest (vitest)
v3.2.6Compare Source
v3.2.5Compare Source
Configuration
📅 Schedule: (in timezone Europe/Berlin)
🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.
♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.
🔕 Ignore: Close this PR and you won't be reminded about this update again.
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