GitHub Advisoryadvisory · crates.io

GHSA-g588-cjg3-6g78 Steamworks game clients/servers using P2P authentication vulnerable to denial of service

MEDIUM Published 2026-05-11 Modified 2026-05-11 Official page ↗
Ecosystem
crates.io
Packages
steamworks
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weaknesses
CWE-20
Reviewed
2026-05-11

Affected packages

• crates.io steamworks: < 0.13.1 → fixed in 0.13.1

Description

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.

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References