CVE Catalog

CVE-2026-102600

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.37%

28th percentile - higher than 28% of all known CVEs

Summary

Prior to version 0.1.1, @socket.io/cluster-engine uses inherited object properties when looking up attacker-controlled session IDs in clustered deployments. Special property names such as __proto__ or constructor can resolve through the object prototype chain instead of identifying an actual connected client, causing the Node.js process to crash and resulting in denial of service. Applications that do not use @socket.io/cluster-engine are not affected.

Risk Assessment

An attacker can remotely crash the Node.js process, causing service unavailability for all users. This only affects clustered deployments using @socket.io/cluster-engine.

Recommendation

Upgrade @socket.io/cluster-engine to version 0.1.1 or later. If the package is not used, no action is required.

Related vulnerabilities

Original NVD description (English source)

Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 0.1.1, @socket.io/cluster-engine uses inherited object properties when looking up attacker-controlled session IDs in clustered deployments. Special property names such as __proto__ or constructor can resolve through the object prototype chain instead of identifying an actual connected client, causing the Node.js process to crash and resulting in denial of service. Applications that do not use @socket.io/cluster-engine are not affected. This issue is fixed in version 0.1.1.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS