What is GHSA-9v98-6g37-x9g6?

GHSA-9v98-6g37-x9g6 is a security advisory published by GitHub Security Advisories with Critical severity. deepstream is vulnerable to prototype pollution

Which CVE IDs does GHSA-9v98-6g37-x9g6 cover?

GHSA-9v98-6g37-x9g6 covers the following CVE IDs: CVE-2026-49252. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-9v98-6g37-x9g6?

GHSA-9v98-6g37-x9g6 has a CVSS v3 base score of 9.9, published by GitHub Security Advisories.

Which products are affected by GHSA-9v98-6g37-x9g6?

GHSA-9v98-6g37-x9g6 affects 1 product, including: npm/@deepstream/server:\u003c 10.0.5.

GHSA-9v98-6g37-x9g6CriticalCVSS 9.9

deepstream is vulnerable to prototype pollution

Vendor

GitHub Security Advisories

Published

June 26, 2026

Last Modified

June 26, 2026

🔗 CVE IDs covered (1)

CVE-2026-49252 →

📋 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

🎯 Affected products1

npm/@deepstream/server:< 10.0.5

🔗 References (4)

https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6
https://nvd.nist.gov/vuln/detail/CVE-2026-49252
https://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44
https://github.com/advisories/GHSA-9v98-6g37-x9g6