CVE-2026-53633Vitest: Exposed Browser Mode API Can Proxy CDP and Overwrite Config Files, Leading to RCE
- 9.8CriticalCVSS base score
- 0.90%Exploitation in 30 daysEPSS · top 40% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.
Timeline
ID reserved
By GitHub_M
- 35 days later
· 35 days later
Published
- 15 days later
· 15 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.90% · top 40% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected >= 3.0.0, < 3.2.5
- affected >= 4.0.0, < 4.1.8
- affected >= 5.0.0-beta.0, < 5.0.0-beta.4
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npm@vitest/browserGHSA-g8mr-85jm-7xhm (opens in a new tab)
- npmvite-plusGHSA-g8mr-85jm-7xhm (opens in a new tab)
References
References10
- https://github.com/vitest-dev/vitest/security/advisories/GHSA-g8mr-85jm-7xhm (opens in a new tab)x_refsource_CONFIRM
- https://github.com/vitest-dev/vitest/pull/10444 (opens in a new tab)x_refsource_MISC
- https://github.com/vitest-dev/vitest/pull/10450 (opens in a new tab)x_refsource_MISC
- https://github.com/vitest-dev/vitest/pull/10456 (opens in a new tab)x_refsource_MISC
- https://github.com/vitest-dev/vitest/commit/385a1aefd4c2bfa5e7d58bf7c6834c929969f2c7 (opens in a new tab)x_refsource_MISC
- https://github.com/vitest-dev/vitest/commit/63e3b2eee4d58da56786a6333f517b9b492528c7 (opens in a new tab)x_refsource_MISC
- https://github.com/vitest-dev/vitest/commit/e4067b3b150005fd42cf75f994300119245806b9 (opens in a new tab)x_refsource_MISC
- https://github.com/vitest-dev/vitest/releases/tag/v3.2.5 (opens in a new tab)x_refsource_MISC
- https://github.com/vitest-dev/vitest/releases/tag/v4.1.8 (opens in a new tab)x_refsource_MISC
- https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.4 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-44403 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-g8mr-85jm-7xhm (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-53633)Record last updated .