# CVE-2026-53633

## Summary

- **CVE ID:** CVE-2026-53633
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-749, CWE-862
- **Published:** Jul 14, 2026
- **Last Modified:** Jul 29, 2026

## 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 (>= 3.0.0, < 3.2.5)
- vitest-dev — vitest (>= 4.0.0, < 4.1.8)
- vitest-dev — vitest (>= 5.0.0-beta.0, < 5.0.0-beta.4)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.90%
- **EPSS Percentile:** 57.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._