deepstream is vulnerable to prototype pollution_CVE-2026-49252

9.9 / 10

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

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.

Basic Information

ID CVE-2026-49252

Source GitHub_M

Published Jun 18, 2026 at 20:01

Affected Product

Vendor deepstreamIO

Product deepstream.io

Version < 10.0.5

Affected Versions deepstreamIO deepstream.io < 10.0.5

CWE Classification

CWE-1321

References

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    "published": "2026-06-18T20:01:31.307Z",
    "modified": "2026-06-18T20:01:31.307Z",
    "type": "cve",
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    "references": "https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6\nhttps://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44",
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