CVE-2026-112948 Vitest: Servers misapply `server.fs.deny`, serving `.env`, private keys, `.git`, and the API token file
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-112948?
CVE-2026-112948 is a medium-severity vulnerability in @vitest browser, published on 20 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-112948?
6 open source packages ship an affected version, including @vitest/browser, @vitest/ui and vite-plus.
| Package | Affected | Fixed in |
|---|---|---|
@vitest/browser npm | From 5.0.0-beta.6 | 5.0.5 |
@vitest/browser npm | From 5.0.0-beta.6 | 5.0.5 |
@vitest/ui npm | From 5.0.0-beta.6 | 5.0.5 |
@vitest/ui npm | From 5.0.0-beta.6 | 5.0.5 |
vite-plus npm | From 1.0.0-rc.0 | 1.3.0 |
vite-plus npm | From 1.0.0-rc.0 | 1.3.0 |
How do I fix CVE-2026-112948?
Upgrade @vitest/browser to 5.0.5 or later.
Is CVE-2026-112948 being exploited?
There is no known exploitation of CVE-2026-112948 in the wild and no public exploit code.
Sources
Also known as GHSA-p458-7748-mcp3.