Summaryinfo

A vulnerability was found in ArthurFiorette steam-trader 2.1.1. It has been declared as problematic. This affects an unknown function of the file /users of the component API Endpoint. Such manipulation leads to information disclosure. This vulnerability is traded as CVE-2026-5128. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in ArthurFiorette steam-trader 2.1.1 and classified as problematic. Affected by this issue is some unknown processing of the file /users of the component API Endpoint. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

A sensitive information exposure vulnerability exists in ArthurFiorette steam-trader 2.1.1. An unauthenticated attacker can send a request to the /users API endpoint to retrieve highly sensitive Steam account data, including the account username, password, identity secret, and shared secret. In addition, application logs expose authentication artifacts such as access tokens, refresh tokens, and session identifiers. This information allows an attacker to generate valid Steam Guard (2FA) codes, hijack authenticated sessions, and obtain full control over the affected Steam account, including unauthorized access to inventory and trading functionality. No fix is available because the repository is archived and no longer maintained.

The weakness was shared by Jamshed Yergashvoyev. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-5128 since 03/30/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/30/2026). The MITRE ATT&CK project declares the attack technique as T1592.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-17075). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• ArthurFiorette

Name

• steam-trader

Version

• 2.1.1

CPE 2.3info

• 🔒

CPE 2.2info

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