GHSA-g588-cjg3-6g78: Steamworks Denial of Service Vulnerability

MODERATE
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CWE-20
Published
Advisory Summary

GHSA-g588-cjg3-6g78 is a MODERATE denial of service vulnerability (CWE-20: Improper Input Validation) affecting Steamworks libraries in the crates.io ecosystem. The issue involves steamworks game clients/servers using p2p authentication vulnerable to denial of service. Remediation is available by upgrading affected packages to version 0.13.1.

GHSA-g588-cjg3-6g78 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-g588-cjg3-6g78
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-20: Improper Input Validation
Affected Product Steamworks
Package Ecosystem crates.io
Published Date
Last Updated

How to Fix GHSA-g588-cjg3-6g78

To remediate this vulnerability, upgrade all affected Steamworks dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

steamworks fixed: 0.13.1 
Upgrade steamworks to 0.13.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for steamworks

How to Check if You Are Affected

To determine whether your application is affected by GHSA-g588-cjg3-6g78, inspect your project dependencies for Steamworks:

inspect dependencies for steamworks

Analyze the terminal output to locate any version of Steamworks in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.13.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Steamworks, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

GHSA-g588-cjg3-6g78 Affected Steamworks Versions

1 component(s)
Fixed Versions:
0.13.1
Product / Package Ecosystem Affected Versions Fixed Version
steamworks
 crates.io
< 0.13.1
0.13.1

References

Steamworks Source Repository REPOSITORY
https://github.com/Noxime/steamworks-rs/issues/321
Steamworks Source Repository REPOSITORY
https://github.com/Noxime/steamworks-rs
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2026-0121.html

Frequently Asked Questions

What is GHSA-g588-cjg3-6g78?
GHSA-g588-cjg3-6g78 is a security vulnerability in Steamworks involving Steamworks game clients/servers using P2P authentication vulnerable to denial of service under CWE-20: Improper Input Validation.
Which Steamworks versions are affected?
Affected versions include releases prior to 0.13.1 across affected packages: steamworks.
What version fixes GHSA-g588-cjg3-6g78?
Upgrading to 0.13.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is steamworks affected?
Yes, steamworks is affected in releases prior to 0.13.1. Upgrade your dependency to 0.13.1 or later.
What CWE is associated with GHSA-g588-cjg3-6g78?
GHSA-g588-cjg3-6g78 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check crates.io dependencies for GHSA-g588-cjg3-6g78?
Run the dependency tree command: 'inspect dependencies for steamworks'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g588-cjg3-6g78",
  "modified" : "2026-05-11T14:40:17Z",
  "published" : "2026-05-11T14:40:17Z",
  "aliases" : [ ],
  "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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "steamworks"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.13.1"
      } ]
    } ]
  } ],
  "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-11T14:40:17Z",
    "nvd_published_at" : null
  }
}