deepstreamio/deepstream.io · Security
deepstream is vulnerable to prototype pollution
- GHSA ID
- GHSA-9v98-6g37-x9g6
- CVE ID
- CVE-2026-49252
- Severity
- critical
- Published
- Updated
- CVSS
- 9.9 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
- CVSS v3
- 9.9 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Description
Impact
Prototype pollution in deepstream server v <=10.0.4. Potential privilege escalation from any authenticated user with write permission to any record.
Patches
Yes, upgrade to v10.0.5
Workarounds
Filter out all messages containing the path __proto__, constructor, prototype, before they reach the server's message pipeline
CWEs
- CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')