Is CVE-2026-53633 actively exploited?

No active exploitation of CVE-2026-53633 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-53633 be exploited remotely?

Yes. CVE-2026-53633 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-53633?

CVE-2026-53633 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-53633

CWE-749Published: July 14, 2026· Updated: Jul 16, 2026

9.8

CVSS v3.1

EPSS:0.58%probability of exploitation in 30 daysPercentile:44.0th

Official 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.

NVD Source

Risk Analysis

This critical vulnerability in Vitest's Browser Mode allows a remote client to execute arbitrary Node.js code by overwriting vite.config.ts. With a CVSS score of 9.8 (CRITICAL), this flaw presents a severe risk for remote code execution.

No public exploit is currently known for this vulnerability.

Recommended Action

Upgrade Vitest to versions 3.2.5, 4.1.8, or 5.0.0-beta.4 or later to address this vulnerability. Restrict access to the cdp() API in Vitest Browser Mode.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2026-53633 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.