Answer in brief
CVE-2026-48039 records a Critical severity (CVSS 9.1) vulnerability in Meta Ads MCP: Unauthenticated HTTP MCP Tool Execution Leaks Operator Meta Access Token. The current sources do not mark it as known exploited. The current feed maps pipeboard-co/meta-ads-mcp (generic), meta-ads-mcp (pip), meta-ads-mcp (pypi). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps pipeboard-co/meta-ads-mcp (generic), meta-ads-mcp (pip), meta-ads-mcp (pypi). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| pipeboard-co/meta-ads-mcpgeneric | < 1.0.109 | Not reported |
| meta-ads-mcppip | <=1.0.108 | 1.0.109 |
| meta-ads-mcppypi | >=0 <1.0.109 | 1.0.109 |
Published upstream
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.