QTINeon has unauthenticated relay-to-host amplification via unbounded RECONNECT_REQUEST forwarding
Priority MEDIUM 44CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0046 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Quiet-Terminal-Interactive | QTINeon | 1.0.0 | — | No fix listed | CNA |
| — | com.quietterminal:qti-neon (Maven) | — | — | No fix listed | GHSA-85rg-p3fr-xc2f |
| — | qti-neon (PyPI) | — | — | No fix listed | GHSA-85rg-p3fr-xc2f |
| — | qti-neon (npm) | — | — | No fix listed | GHSA-85rg-p3fr-xc2f |
- QTINeon VendorQuiet-Terminal-Interactive Affected 1.0.0 Fixed in — No fix listed CNA
- com.quietterminal:qti-neon (Maven) Vendor— Affected — Fixed in — No fix listed GHSA-85rg-p3fr-xc2f
- qti-neon (PyPI) Vendor— Affected — Fixed in — No fix listed GHSA-85rg-p3fr-xc2f
- qti-neon (npm) Vendor— Affected — Fixed in — No fix listed GHSA-85rg-p3fr-xc2f
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-54609
- 2026-10-03 Alias added: GHSA-85rg-p3fr-xc2f
References
Sources
- CVE-2026-54609 · CVE Program
- CVE-2026-54609 · NVD
- FIRST EPSS
- GHSA-85rg-p3fr-xc2f · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences