CVE-2026-53633

CRITICAL 9.8

Vitest: Exposed Browser Mode API Can Proxy CDP and Overwrite Config Files, Leading to RCE

CVSS Score

9.8

EPSS Score

0.6%

EPSS Percentile

44th

Vitest is a testing framework powered by Vite. From 3.0.0 until 3.2.5, 4.1.8, and 5.0.0-beta.4, Vitest Browser Mode exposed a cdp() API that forwarded raw Chrome DevTools Protocol methods without being gated by allowWrite or allowExec, allowing a remote client with exposed browser API metadata to use CDP Page.setDownloadBehavior and Runtime.evaluate to overwrite vite.config.ts and execute attacker-controlled Node.js code. This issue is fixed in versions 3.2.5, 4.1.8, and 5.0.0-beta.

CWE	CWE-749 CWE-862
Vendor	vitest-dev
Product	vitest
Published	Jul 14, 2026
Last Updated	Jul 16, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

vitest-dev / vitest

>= 3.0.0, < 3.2.5 >= 4.0.0, < 4.1.8 >= 5.0.0-beta.0, < 5.0.0-beta.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗