Is CVE-2026-62963 actively exploited?

No active exploitation of CVE-2026-62963 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-62963 be exploited remotely?

Yes. CVE-2026-62963 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-62963?

CVE-2026-62963 has a CVSS score of 8.7 (HIGH).

HOME VULNERABILITIESCVE-2026-62963

HIGH

CVE-2026-62963

CWE-409Published: July 16, 2026· Updated: Jul 16, 2026

8.7

CVSS v3.1

Official Description

Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.4, Centrifugo unidirectional WebSocket transport with uni_websocket.compression enabled enforced uni_websocket.message_size_limit against compressed wire-frame length in internal/websocket/conn.go advanceFrame, but ReadMessage used io.ReadAll after decompression without an output cap, allowing unauthenticated requests to /connection/uni_websocket to trigger large memory and CPU consumption. This issue is fixed in version 6.8.4.

NVD Source

Technical Analysis

CVE-2026-62963 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X