Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-53633

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

CVE-2026-53633

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

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.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Related Resources

No items found.

References

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/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53633.json, https://github.com/vitest-dev/vitest/security/advisories/GHSA-g8mr-85jm-7xhm, https://nvd.nist.gov/vuln/detail/CVE-2026-53633, 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

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00896%
EPSS Percentile
0.57543%
Introduced Version
0
Fix Available
e4067b3b150005fd42cf75f994300119245806b9

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading