GHSA-g588-cjg3-6g78
Steamworks game clients/servers using P2P authentication vulnerable to denial of service
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
What each source reports
GitHub Advisories Score used
Steamworks game clients/servers using P2P authentication vulnerable to denial of service
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.
- Record
GHSA-g588-cjg3-6g78- CVSS 4.0
- 6.3 Medium
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 - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
Steamworks game clients/servers using P2P authentication vulnerable to denial of service
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.
- Record
GHSA-g588-cjg3-6g78- CVSS 4.0
- 6.3 Medium
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 - Weakness
- CWE-20
- Updated
- 2026-11-02
OSVRUSTSEC-2026-0121No score
Denial of service in Steamworks game clients/servers using P2P authentication
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.
- Record
RUSTSEC-2026-0121- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
steamworkscrates.io | before 0.13.1 | 0.13.1 |
steamworkscrates.io | 0.0.0-0 up to 0.13.1 | 0.13.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-g588-cjg3-6g78 is a medium vulnerability (CVSS 6.3) in steamworks, published May 5, 2026. No source lists public exploit code. Fixed in steamworks 0.13.1.