{"id":"CVE-2026-54609","summary":"QTINeon has unauthenticated relay-to-host amplification via unbounded RECONNECT_REQUEST forwarding","details":"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.","aliases":["GHSA-85rg-p3fr-xc2f"],"modified":"2026-07-29T03:31:40.406121397Z","published":"2026-07-28T16:36:37.938Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54609.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-400","CWE-406","CWE-770"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54609.json"},{"type":"ADVISORY","url":"https://github.com/Quiet-Terminal-Interactive/QTINeon/security/advisories/GHSA-85rg-p3fr-xc2f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54609"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/quiet-terminal-interactive/qtineon","events":[{"introduced":"64c3cb67e8e758b870413ec797ffee256e5c8c45"},{"last_affected":"64c3cb67e8e758b870413ec797ffee256e5c8c45"}],"database_specific":{"extracted_events":[{"introduced":"1.0.0"},{"last_affected":"1.0.0"}],"source":"AFFECTED_FIELD"}}],"versions":["1.0.0","godot-v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54609.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"}]}