CVE-2026-54547Public exploitNetwork attack vectorHinoki check available

Unauthenticated operator data access via header guard bypass

Published Sep 15, 2026 · Updated Sep 15, 2026

Improper authentication in Facebook/Meta Ads MCP Server 1.0.113 and earlier allows remote attackers to read or modify operator ad data. AuthInjectionMiddleware accepts any X-Pipeboard-Token as sufficient for its guard but establishes no authentication context, causing tool handlers to reuse META_ACCESS_TOKEN. Exploitation requires network-reachable streamable-http transport and an operator token; stdio deployments and servers without that token are unaffected.

CVSS severity7.4
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authentication in Facebook/Meta Ads MCP Server 1.0.113 and earlier allows remote attackers to read or modify operator ad data. AuthInjectionMiddleware accepts any X-Pipeboard-Token as sufficient for its guard but establishes no authentication context, causing tool handlers to reuse META_ACCESS_TOKEN. Exploitation requires network-reachable streamable-http transport and an operator token; stdio deployments and servers without that token are unaffected.

The record

CVE
CVE-2026-54547
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
GoMarble AI
Product
Facebook/Meta Ads MCP Server
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.115

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GoMarble AI · Facebook/Meta Ads MCP Serverversion=< 1.0.115

Published CVSS scores

7.4GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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