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Socket.IO: Prototype Pollution via Unsafe Client Session Lookup

CVE-2026-102600 affects @socket.io/cluster-engine. CVSS base score 7.5 (GitHub Advisory Database). EPSS 0.00366 (percentile 0.28155), scored 2026-10-04. Affected range: < 0.1.1. Fixed version: 0.1.1.

Published 2026-10-06 00:14:26.927785+00:00

CVE

CVE-2026-102600

Product

@socket.io/cluster-engine

CCR priority

30.1 /100 (P4)

CVSS

7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · GitHub Advisory Database

EPSS

0.00366 · percentile 0.28155 · 2026-10-04

KEV

no

Affected products

• @socket.io/cluster-engine · < 0.1.1 · Fixed version: 0.1.1

Provenance

• GitHub Advisory Database · Source record · observed 2026-10-06 00:14:20.210633+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-102600.html