What’s Vulnerable › Vulnerabilities

CVE-2026-53633: Vitest: Exposed Browser Mode API Can Proxy CDP and Overwrite Config Files, Leading to RCE

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-14 · updated 2026-10-24
• Weakness: CWE-749

Description

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.

Affected products

• vitest-dev vitest: from 3.0.0, < 3.2.5; from 4.0.0, < 4.1.8; from 5.0.0-beta.0, < 5.0.0-beta.4

References

• https://github.com/vitest-dev/vitest/commit/385a1aefd4c2bfa5e7d58bf7c6834c929969f2c7
• https://github.com/vitest-dev/vitest/commit/63e3b2eee4d58da56786a6333f517b9b492528c7
• https://github.com/vitest-dev/vitest/commit/e4067b3b150005fd42cf75f994300119245806b9
• https://github.com/vitest-dev/vitest/pull/10444
• https://github.com/vitest-dev/vitest/pull/10450
• https://github.com/vitest-dev/vitest/pull/10456
• https://github.com/vitest-dev/vitest/releases/tag/v3.2.5
• https://github.com/vitest-dev/vitest/releases/tag/v4.1.8
• https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.4
• https://github.com/vitest-dev/vitest/security/advisories/GHSA-g8mr-85jm-7xhm

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