What is CVE-2026-54609?

CVE-2026-54609 is a high-severity vulnerability in Quiet-Terminal-Interactive Qtineon, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2026-07-28.

How severe is CVE-2026-54609?

High severity. CVSS v3 base score is 8.6 out of 10.

Resource exhaustion in Quiet-Terminal-Interactive Qtineon

CVE-2026-54609

QTI Neon is a minimal, game-agnostic, relay-based UDP multiplayer protocol library. In version 1.0.0, the relay's handleReconnectRequest forwards RECONNECT_REQUEST packets to the host without bounding them, so an unauthenticated client can drive relay-to-host amplification and cause a denial of service on the host. No fixed version is available as of this review.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.003 (18.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Quiet-terminal-interactive Qtineon — versions 1.0.0

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54609?: CVE-2026-54609 is a high-severity vulnerability in Quiet-Terminal-Interactive Qtineon, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2026-07-28.
How severe is CVE-2026-54609?: High severity. CVSS v3 base score is 8.6 out of 10.