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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-11-05T22:05:46.734Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/11/05/5"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-123017",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-10T13:54:34.782126Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        "providerMetadata": {
          "dateUpdated": "2026-11-10T13:54:47.518Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "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": [
            {
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              "type": "text/html",
              "value": "A Godot game whose multiplayer transport is GodotSteam\u0027s 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.\u003cbr\u003e"
            }
          ],
          "value": "A Godot game whose multiplayer transport is GodotSteam\u0027s 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": [
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              "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": [
            {
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              "type": "text/html",
              "value": "Game-side only: on the plugin\u0027s 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\u0027s 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."
        }
      ],
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  "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": "2026-11-10T13:54:47.518Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}