giuseppe99barchetta SuggestArr up to 2.x Authentication Middleware middleware.py enforce_authentication remote_addr improper authentication

Summaryinfo

A vulnerability described as critical has been identified in giuseppe99barchetta SuggestArr up to 2.x. Affected by this issue is the function enforce_authentication of the file api_service/auth/middleware.py of the component Authentication Middleware. Executing a manipulation of the argument remote_addr can lead to improper authentication. This vulnerability is handled as CVE-2026-113703. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in giuseppe99barchetta SuggestArr up to 2.x and classified as critical. This vulnerability affects the function enforce_authentication of the file api_service/auth/middleware.py of the component Authentication Middleware. The manipulation of the argument remote_addr with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

SuggestArr before 3.0.0 contains an authentication bypass vulnerability in its local_bypass authentication mode where enforce_authentication() in api_service/auth/middleware.py trusts the client-controlled request.remote_addr value, which is derived from the spoofable X-Forwarded-For header due to ProxyFix(x_for=1) configuration in api_service/app.py. Attackers can send a request with X-Forwarded-For set to a trusted CIDR address such as 127.0.0.1 to be granted an unauthenticated admin session via _load_bypass_user_context(), gaining full administrative access to endpoints like /api/users and /api/jobs without providing any credentials.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-113703 since 10/20/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 3.0.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-105106). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• giuseppe99barchetta

Name

• SuggestArr

Version

• 2.x

Website

• Product: https://github.com/giuseppe99barchetta/SuggestArr/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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