CVE-2026-48039

The record

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.

Affected packages

Related vulnerabilities

• CVE-2026-114638 Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability in the… CWE-287
• CVE-2026-114639 Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 contains an authentication bypass… CWE-287
• CVE-2026-112104 A flaw has been found in eremef bandcamp-player up to 1.8.33-beta. CWE-287
• CVE-2026-107228 The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP… CWE-287
• CVE-2026-86781 The SSL Zen — SSL Certificate Installer & HTTPS Redirects WordPress plugin before 4.7.40… CWE-287
• CVE-2026-14563 The advanced-customized-prompts WordPress plugin through 1.0.1 does not verify the… CWE-287
• CVE-2026-14559 The teddy-bear-customize-addon WordPress plugin through 1.0.5 does not verify a user's… CWE-287
• CVE-2026-88895 CyberPanel before 3.0.5 fails to enforce two-factor authentication on API endpoints… CWE-287