CVE-2026-112948: Vitest: Servers misapply `server.fs.deny`, serving `.env`, private keys, `.git`, and the API token file

Description

Vitest is a testing framework powered by Vite. From 5.0.0-beta.6 until 5.0.5, Vitest dev servers can misapply server.fs.deny because project servers replace Vite's defaults and the root server adds .vitest-secret-token after Vite compiles its matcher. An attacker who can reach an affected UI, Browser Mode, or API server can read denied project files or the fallback API token at node_modules/.vitest/.vitest-secret-token, and Browser Mode with test.projects can expose JavaScript-compatible .env values through a malicious website. This issue is fixed in version 5.0.5.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

High

Integrity

None

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 34% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

BR

browser · @vitest

>= 5.0.0-beta.6, < 5.0.5 · source: vendor

UI

ui · @vitest

>= 5.0.0-beta.6, < 5.0.5 · source: vendor

VI

vite-plus · vitejs

>= 1.0.0-rc.0, < 1.3.0 · source: vendor

VI

vitest · vitest-dev

>= 5.0.0-beta.6, < 5.0.5 · source: vendor