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@deepstream/server <=10.0.4 Prototype Pollution Privilege Escalation

Prototype pollution vulnerability in deepstream server versions <=10.

27 Jun 2026Read 1 minSeverity: act now

What changed

Prototype pollution vulnerability in deepstream server versions <=10.0.4 allows privilege escalation from any authenticated user with write permission to any record.

Who it affects

All users of deepstream/server versions <=10.0.4, especially those with authenticated users having write permissions.

What to do today

Upgrade to version 10.0.5 or apply workaround by filtering out messages containing paths __proto__, constructor, prototype before they reach the server's message pipeline.

The trail
Collected Audited Written Published