{"cve":"CVE-2026-48039","nvd":{"published":"2026-08-07T20:16:51.723","modified":"2026-10-23T20:10:00.160","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-287"],"references":["https://github.com/pipeboard-co/meta-ads-mcp/releases/tag/1.0.109","https://github.com/pipeboard-co/meta-ads-mcp/security/advisories/GHSA-9gw6-46qc-99vr","https://github.com/pypa/advisory-database/tree/main/vulns/meta-ads-mcp/PYSEC-2026-413.yaml","https://github.com/pipeboard-co/meta-ads-mcp/security/advisories/GHSA-9gw6-46qc-99vr"],"products":[],"source":"nvd","synced_at":"2026-10-24T16:53:34.184483516+00:00"},"epss":{"cve":"CVE-2026-48039","score":0.00589,"percentile":0.4789,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-9gw6-46qc-99vr","url":"https://osv.dev/vulnerability/GHSA-9gw6-46qc-99vr","summary":"Meta Ads MCP: Unauthenticated HTTP MCP Tool Execution Leaks Operator Meta Access Token","modified":"2026-08-07T19:45:16.238342712Z","packages":[{"ecosystem":"PyPI","name":"meta-ads-mcp","purl":"pkg:pypi/meta-ads-mcp","ranges":["<1.0.109"],"fixed":["1.0.109"]}]},{"id":"PYSEC-2026-413","url":"https://osv.dev/vulnerability/PYSEC-2026-413","summary":"Meta Ads MCP: Unauthenticated HTTP MCP Tool Execution Leaks Operator Meta Access Token","modified":"2026-07-13T16:15:28.282097700Z","packages":[{"ecosystem":"PyPI","name":"meta-ads-mcp","purl":"pkg:pypi/meta-ads-mcp","ranges":["<1.0.109"],"fixed":["1.0.109"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}