Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD 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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
🚨 Security Advisory: How CVE-2026-112948 in Vitest 5 leaked raw .env files over plain HTTP. A simple array bug in server.fs.deny dropped Vite's default file protections during "vitest --ui" test runs. Here is how to audit & patch your project 🧵👇 https://t.co/YrqDUJNbZe
To remediate: Upgrade to Vitest >= 5.0.2 Explicitly guard .env in vite.config.ts Rotate exposed secrets using offline CSPRNG tools Full technical breakdown & remediation guide: https://www.devomnitools.com/en/guides/vitest-dev-server-secret-leak-cve-2026-112948/ #webdev #security #JavaScript