{"api_version":"1","generated_at":"2026-11-05T10:34:46+00:00","cve":"CVE-2026-123017","urls":{"html":"https://cve.report/CVE-2026-123017","api":"https://cve.report/api/cve/CVE-2026-123017.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-123017","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-123017"},"summary":{"title":"CVE-2026-123017","description":"GodotSteam 4.17 through 4.23.2 trusts the peer value of 1 to mean that a player is the server. A grant_gold(1000000) call can be forged.","state":"PUBLISHED","assigner":"mitre","published_at":"2026-11-05 07:17:24","updated_at":"2026-11-05 07:17:24"},"problem_types":["CWE-290","CWE-290 CWE-290 Authentication Bypass by Spoofing"],"metrics":[{"version":"3.1","source":"cve@mitre.org","type":"Secondary","score":"6.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"6.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}}],"references":[{"url":"https://github.com/bitbutter/godot-security-pocs/tree/main/2026-11-godotsteam-peer-id-claim","name":"https://github.com/bitbutter/godot-security-pocs/tree/main/2026-11-godotsteam-peer-id-claim","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://axeghost.offprint.app/a/3mzhxoqpnh423-any-networked-co-player-can-act-as-the-server-in-a-godotsteam-game","name":"https://axeghost.offprint.app/a/3mzhxoqpnh423-any-networked-co-player-can-act-as-the-server-in-a-godotsteam-game","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.openwall.com/lists/oss-security/2026/11/04/11","name":"https://www.openwall.com/lists/oss-security/2026/11/04/11","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://codeberg.org/godotsteam/godotsteam","name":"https://codeberg.org/godotsteam/godotsteam","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-123017","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123017","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"godotsteam","product":"GodotSteam","version":"affected 4.17.0 4.23.2 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[{"source":"CNA","title":"","value":"Game-side only: on the plugin's peer_connected signal for peer ID 1, compare Steam.get_steam_id_for_peer_id(1) with the expected server Steam ID (the lobby owner, or the ID passed to create_client) and close the multiplayer peer on a mismatch. The guard ships in the reproduction kit. No plugin setting rejects a false claim.","time":"","lang":"en"}],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unknown","modules":["SteamMultiplayerPeer"],"product":"GodotSteam","programFiles":["src/godotsteam_multiplayer_peer.cpp","src/steam_packet_peer.cpp"],"programRoutines":[{"name":"SteamMultiplayerPeer::upgrade_peer"},{"name":"SteamPacketPeer::set_peer_id"}],"repo":"https://codeberg.org/godotsteam/godotsteam","vendor":"godotsteam","versions":[{"lessThanOrEqual":"4.23.2","status":"affected","version":"4.17.0","versionType":"semver"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"A Godot game whose multiplayer transport is GodotSteam's SteamMultiplayerPeer (create_host, host_with_lobby, or connect_to_lobby), in a session the attacker can join: a public or joinable lobby, matchmaking, or an open dedicated server. Games using only achievements, input, or leaderboards, and games on the ENet or WebSocket transports, are not exposed.<br>"}],"value":"A Godot game whose multiplayer transport is GodotSteam's SteamMultiplayerPeer (create_host, host_with_lobby, or connect_to_lobby), in a session the attacker can join: a public or joinable lobby, matchmaking, or an open dedicated server. Games using only achievements, input, or leaderboards, and games on the ENet or WebSocket transports, are not exposed."}],"descriptions":[{"lang":"en","value":"GodotSteam 4.17 through 4.23.2 trusts the peer value of 1 to mean that a player is the server. A grant_gold(1000000) call can be forged."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-290","description":"CWE-290 Authentication Bypass by Spoofing","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-05T06:17:04.908Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"url":"https://axeghost.offprint.app/a/3mzhxoqpnh423-any-networked-co-player-can-act-as-the-server-in-a-godotsteam-game"},{"url":"https://github.com/bitbutter/godot-security-pocs/tree/main/2026-11-godotsteam-peer-id-claim"},{"url":"https://codeberg.org/godotsteam/godotsteam"},{"url":"https://www.openwall.com/lists/oss-security/2026/11/04/11"}],"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Game-side only: on the plugin's peer_connected signal for peer ID 1, compare Steam.get_steam_id_for_peer_id(1) with the expected server Steam ID (the lobby owner, or the ID passed to create_client) and close the multiplayer peer on a mismatch. The guard ships in the reproduction kit. No plugin setting rejects a false claim."}],"value":"Game-side only: on the plugin's peer_connected signal for peer ID 1, compare Steam.get_steam_id_for_peer_id(1) with the expected server Steam ID (the lobby owner, or the ID passed to create_client) and close the multiplayer peer on a mismatch. The guard ships in the reproduction kit. No plugin setting rejects a false claim."}],"x_generator":{"engine":"CVE-Request-form 0.0.1"}}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2026-123017","datePublished":"2026-11-05T06:17:04.908Z","dateReserved":"2026-11-05T06:17:04.506Z","dateUpdated":"2026-11-05T06:17:04.908Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-05 07:17:24","lastModifiedDate":"2026-11-05 07:17:24","problem_types":["CWE-290","CWE-290 CWE-290 Authentication Bypass by Spoofing"],"metrics":{"cvssMetricV31":[{"source":"cve@mitre.org","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":2.5}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"123017","Ordinal":"1","Title":"CVE-2026-123017","CVE":"CVE-2026-123017","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"123017","Ordinal":"1","NoteData":"GodotSteam 4.17 through 4.23.2 trusts the peer value of 1 to mean that a player is the server. A grant_gold(1000000) call can be forged.","Type":"Description","Title":"CVE-2026-123017"}]}}}