CVE-2026-102600
highSocket.IO enables bidirectional and low-latency communication for every platform.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/socketio/socket.io/commit/830e3642ebb8dc3784eb749b0a004fe2b932b429 security-advisories@github.com
- https://github.com/socketio/socket.io/releases/tag/@socket.io/cluster-engine@0.1.1 security-advisories@github.com
- https://github.com/socketio/socket.io/security/advisories/GHSA-wfpm-5gcm-94cg security-advisories@github.com