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Critical severity · published Jul 14, 2026
CVE-2026-53633
Vitest: Exposed Browser Mode API Can Proxy CDP and Overwrite Config Files, Leading to RCE
9.8
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vitest · vitest-dev
>= 3.0.0, < 3.2.5; >= 4.0.0, < 4.1.8; >= 5.0.0-beta.0, < 5.0.0-beta.4 · source: vendor
Affected product
VI
vitest
vitest-dev
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53633
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53633
github.com
https://github.com/vitest-dev/vitest/commit/385a1aefd4c2bfa5e7d58bf7c6834c929969f2c7
github.com
https://github.com/vitest-dev/vitest/commit/63e3b2eee4d58da56786a6333f517b9b492528c7
github.com
https://github.com/vitest-dev/vitest/commit/e4067b3b150005fd42cf75f994300119245806b9
github.com
https://github.com/vitest-dev/vitest/pull/10444
github.com
https://github.com/vitest-dev/vitest/pull/10450
github.com
https://github.com/vitest-dev/vitest/pull/10456
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