CVE-2026-49252

critical · 9.9

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.

9.9

CVSS

0.5%

EPSS (exploit prob.)

40th

EPSS percentile

2026-06-18

Published

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

Weaknesses

CWE-1321

References

https://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44
https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-49252