{"cve":"CVE-2026-54609","nvd":{"published":"2026-07-28T17:16:52.507","modified":"2026-10-23T23:10:00.157","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","score":8.6},"cwes":["CWE-400","CWE-406","CWE-770"],"references":["https://github.com/Quiet-Terminal-Interactive/QTINeon/security/advisories/GHSA-85rg-p3fr-xc2f"],"products":[],"source":"nvd","synced_at":"2026-10-24T16:53:27.712498749+00:00"},"epss":{"cve":"CVE-2026-54609","score":0.0046,"percentile":0.39603,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-85rg-p3fr-xc2f","url":"https://osv.dev/vulnerability/GHSA-85rg-p3fr-xc2f","summary":"QTINeon has unauthenticated relay-to-host amplification via unbounded RECONNECT_REQUEST forwarding","modified":"2026-08-04T14:40:38.519029290Z","packages":[{"ecosystem":"Maven","name":"com.quietterminal:qti-neon","purl":"pkg:maven/com.quietterminal/qti-neon","ranges":["1.0.0"],"fixed":[]},{"ecosystem":"PyPI","name":"qti-neon","purl":"pkg:pypi/qti-neon","ranges":["1.0.0"],"fixed":[]},{"ecosystem":"npm","name":"qti-neon","purl":"pkg:npm/qti-neon","ranges":["1.0.0"],"fixed":[]}]},{"id":"PYSEC-2026-3615","url":"https://osv.dev/vulnerability/PYSEC-2026-3615","summary":"QTINeon has unauthenticated relay-to-host amplification via unbounded RECONNECT_REQUEST forwarding","modified":"2026-08-04T14:30:17.878943794Z","packages":[{"ecosystem":"PyPI","name":"qti-neon","purl":"pkg:pypi/qti-neon","ranges":["1.0.0"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}