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RUSTSEC-2026-0121

Denial of service in Steamworks game clients/servers using P2P authentication

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

crates.io/steamworks

Introduced in: 0.0.0-0Fixed in: 0.13.1

Upgrade steamworks to 0.13.1 or newer (ecosystem crates.io).

References

https://crates.io/crates/steamworks[PACKAGE]
https://rustsec.org/advisories/RUSTSEC-2026-0121.html[ADVISORY]
https://github.com/Noxime/steamworks-rs/issues/321[REPORT]