Auth bypass in Vitest-Dev Vitest
CVE-2026-53633
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Vitest-Dev Vitest — versions >= 3.0.0, < 3.2.5, >= 4.0.0, < 4.1.8, >= 5.0.0-beta.0, < 5.0.0-beta.4
Weakness classification (CWE)
References
- github.com/vitest-dev/vitest/security/advisories/GHSA-g8mr-85jm-7xhm
- github.com/vitest-dev/vitest/pull/10444
- github.com/vitest-dev/vitest/pull/10450
- github.com/vitest-dev/vitest/pull/10456
- github.com/vitest-dev/vitest/commit/385a1aefd4c2bfa5e7d58bf7c6834c929969f2c7
- github.com/vitest-dev/vitest/commit/63e3b2eee4d58da56786a6333f517b9b492528c7
- github.com/vitest-dev/vitest/commit/e4067b3b150005fd42cf75f994300119245806b9
- github.com/vitest-dev/vitest/releases/tag/v3.2.5
- github.com/vitest-dev/vitest/releases/tag/v4.1.8
- github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.4
Frequently asked questions
- What is CVE-2026-53633?
- CVE-2026-53633 is a critical-severity vulnerability in Vitest-Dev Vitest, classified under CWE-749. CVSS score: 9.8/10. Published 2026-07-14.
- How severe is CVE-2026-53633?
- Critical severity. CVSS v3 base score is 9.8 out of 10.