CVE-2026-49252

CRITICAL

deepstream is vulnerable to prototype pollution

Title source: cna
STIX 2.1

Description

deepstream is a server that allows clients and backend services to sync data, send messages and make rpcs at scale. Versions prior to 10.0.5 are vulnerable to Prototype Pollution. Exploitation can lead to potential privilege escalation from any authenticated user with write permission to any record. This issue has been fixed in version 10.0.5.

References (2)

Core 2

Scores

CVSS v3 9.9
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Details

CWE
CWE-1321
Status published
Products (1)
deepstreamIO/deepstream.io < 10.0.5
Published Jun 18, 2026
Tracked Since Jun 19, 2026