{"id":"GHSA-g588-cjg3-6g78","aliases":["RUSTSEC-2026-0121"],"url":"https://o3.security/vulnerability/GHSA-g588-cjg3-6g78","summary":"Steamworks game clients/servers using P2P authentication vulnerable to denial of service","details":"Processing the raw `ValidateAuthTicketResponse_t` callback data panics when the `m_eAuthSessionResponse` field is `k_EAuthSessionResponseAuthTicketNetworkIdentityFailure`. This can lead to denial of service in game clients and servers using the `begin_authentication_session` API to authenticate players if a malicious game client sends an authentication ticket with a network identity that does not match that of the verifier.","published":"2026-05-11T14:40:17Z","modified":"2026-05-12T05:26:26.145623189Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"steamworks","fixedVersion":"0.13.1"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/Noxime/steamworks-rs/issues/321"},{"type":"PACKAGE","url":"https://github.com/Noxime/steamworks-rs"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2026-0121.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-05-12T05:26:26.145623189Z"}}