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OpenAdvisories
Critical · 9.9 CVE-2026-49252 EUVD-2026-37943GHSA-9v98-6g37-x9g6

deepstream is vulnerable to prototype pollution

Published Jun 18, 2026 · Updated Jun 22, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
deepstreamIO deepstream.io < 10.0.5 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @deepstream/server < 10.0.5 10.0.5 GHSA-9v98-6g37-x9g6

References