CVE-2026-49252
Critical
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.
SeverityCritical
CVSS9.9
Exploit probability41. percentile0.5%
Product@deepstream/server
PublishedJun 18, 2026
First seenJun 18, 2026
Weakness typeCWE-1321Prototype pollution
How to fix
Update
- @deepstream/server10.0.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @deepstream/servernpm | v < 10.0.5 | 10.0.5 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.