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CVE-2026-48039— Meta Ads MCP: Unauthenticated HTTP MCP Tool Execution Leaks Operator Meta Access Token

Quick assessment

Affected
pipeboard-co meta-ads-mcp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pipeboard-co Meta Ads MCP是pipeboard-co组织的一款整合广告投放与办公流程的智能连接组件。 pipeboard-co Meta Ads MCP 1.0.109之前版本存在授权问题漏洞，该漏洞源于AuthInjectionMiddleware.dispatch()无条件转发未认证的Streamable HTTP请求且未返回401响应，导致任意网络可达调用者无需认证即可调用MCP工具；当无请求凭证时工具处理器回退到META_ACCESS_TOKEN环境变量，且下游Meta G

CVSS 9.1 · Critical EPSS 0.59% · P46

Affected Version Matrix 1

VendorProduct Version RangeStatus
pipeboard-co meta-ads-mcp < 1.0.109 affected
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I. Basic Information for CVE-2026-48039

Vulnerability Information
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Vulnerability Title
Meta Ads MCP: Unauthenticated HTTP MCP Tool Execution Leaks Operator Meta Access Token
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
pipeboard-co Meta Ads MCP 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pipeboard-co Meta Ads MCP是pipeboard-co组织的一款整合广告投放与办公流程的智能连接组件。 pipeboard-co Meta Ads MCP 1.0.109之前版本存在授权问题漏洞，该漏洞源于AuthInjectionMiddleware.dispatch()无条件转发未认证的Streamable HTTP请求且未返回401响应，导致任意网络可达调用者无需认证即可调用MCP工具；当无请求凭证时工具处理器回退到META_ACCESS_TOKEN环境变量，且下游Meta G
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pipeboard-co meta-ads-mcp < 1.0.109 -

II. Public POCs for CVE-2026-48039

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Qwen3.6-35B-A3B · 7514 chars
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III. Intelligence Information for CVE-2026-48039

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Vendor Advisories for CVE-2026-48039 (2)

Other References for CVE-2026-48039 (1)

IV. Related Vulnerabilities

Same product: meta-ads-mcp
Same vendor: pipeboard-co
Same weakness: CWE-287

V. Comments for CVE-2026-48039

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