CVE-2026-49252

CRITICAL

CVSS v3.1: 9.9 · EPSS: 0.0027 (18.4 percentile)

NetworkNo user interactionVendor advisory ref

Source data as of:

At a glance

Severity
CRITICAL
CVSS
9.9 v3.1 · NVD
EPSS
0.0027 (18.4 percentile) · FIRST.org
CISA KEV
No
Attack conditions (CVSS vector)
NetworkNo user interaction · Source: NVD Vector
Published
2026-06-18 · Modified: 2026-06-23
References
Jump to references (2)

CVSS / EPSS / KEV

CVSS v3.1 9.9 / 10 CRITICAL Source: NVD
EPSS 0.0027 18.4 percentile Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

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.

Record details

CVE ID
CVE-2026-49252
CVSS (v3.1)
9.9 (CRITICAL)
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Exploitability subscore
3.1
Impact subscore
6.0
EPSS
0.0027 (18.4 percentile) — 2026-06-24
CISA KEV
No
Weakness (CWE)
CWE-1321
Affected configurations (CPE)
0
Published
2026-06-18
Modified
2026-06-23
Status
Deferred

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same weakness type (CWE)

CVE-2026-44789 CRITICAL CVSS 9.4 CVE-2026-44791 CRITICAL CVSS 9.4 CVE-2026-54639 HIGH CVSS 8.8 CVE-2026-55388 HIGH CVSS 8.1

Published the same year

CVE-2026-10561 CRITICAL CVSS 10.0 CVE-2026-27604 CRITICAL CVSS 10.0 CVE-2026-34908 CRITICAL CVSS 10.0 KEV CVE-2026-34909 CRITICAL CVSS 10.0 KEV
← Back to all records