pipeboard-co meta-ads-mcp up to 1.0.108 Auth Injection Middleware http_auth_integration.py AuthInjectionMiddleware.dispatch improper authentication

Summaryinfo

A vulnerability was found in pipeboard-co meta-ads-mcp up to 1.0.108. It has been rated as critical. This vulnerability affects the function AuthInjectionMiddleware.dispatch of the file http_auth_integration.py of the component Auth Injection Middleware. Performing a manipulation results in improper authentication. This vulnerability was named CVE-2026-48039. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, was found in pipeboard-co meta-ads-mcp up to 1.0.108. This affects the function AuthInjectionMiddleware.dispatch of the file http_auth_integration.py of the component Auth Injection Middleware. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Meta Ads MCP is a Model Context Protocol (MCP) server that lets AI assistants run Meta Ads. Prior to version 1.0.109, `AuthInjectionMiddleware.dispatch()` at `http_auth_integration.py:272` unconditionally forwards unauthenticated Streamable HTTP requests to downstream MCP tool handlers without issuing a `401` response, allowing any network-reachable caller to invoke MCP tools without authentication. When no per-request credential is present, tool handlers fall back to the `META_ACCESS_TOKEN` environment variable, and when the downstream Meta Graph API call fails, `api.py:263–269` serialises the raw `httpx` request URL—including the operator's `access_token` as a query parameter—into the JSON-RPC response body, delivering the credential to the unauthenticated caller. Version 1.0.109 fixes the issue.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-48039 since 05/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

Upgrading to version 1.0.109 eliminates this vulnerability.

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Productinfo

Type

• Artificial Intelligence Software

Vendor

• pipeboard-co

Name

• meta-ads-mcp

Version

• 1.0.108

Website

• Product: https://github.com/pipeboard-co/meta-ads-mcp/

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