CVE-2026-54609 json
QTINeon has unauthenticated relay-to-host amplification via unbounded RECONNECT_REQUEST forwarding
published 2026-07-28 3 mo ago modified 2026-10-23 16 d ago also GHSA-85rg-p3fr-xc2f , PYSEC-2026-3615 , EUVD-2026-49905
- cvss
- 8.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| GitHub | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| OSV | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | com.quietterminal:qti-neon | 1 listed version |
no fix listed |
| pypi | qti-neon | 1 listed version |
no fix listed |
| npm | qti-neon | 1 listed version |
no fix listed |
Affected products
- Quiet-Terminal-Interactive QTINeon
Classification
References
Sources
- CVE List CVE-2026-54609
- GitHub Advisory GHSA-85rg-p3fr-xc2f
- NVD CVE-2026-54609
- OSV PYSEC-2026-3615
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.