{"id":"CVE-2026-54547","state":"PUBLISHED","title":"Meta Ads MCP: X-Pipeboard-Token Header Auth Bypass Reuses Operator Meta Token","description":"Meta Ads MCP is a Model Context Protocol (MCP) server that lets AI assistants run Meta Ads. Prior to version 1.0.115, AuthInjectionMiddleware in meta_ads_mcp/core/http_auth_integration.py rejects HTTP MCP requests only when both auth_token and pipeboard_token are absent, while extract_token_from_headers() does not recognize X-Pipeboard-Token as a primary credential. A network caller using the streamable-http transport can therefore send any X-Pipeboard-Token value, pass the guard without establishing authentication context, and cause get_auth_token() to fall back to the server operator's META_ACCESS_TOKEN. Subsequent MCP tools execute with the operator's Meta credentials and can read or modify the operator's Meta Ads data. Deployments using the default stdio transport or without META_ACCESS_TOKEN are not affected. This issue is fixed in version 1.0.115.","publishedAt":"2026-09-15T17:17:17.216Z","updatedAt":"2026-09-17T16:23:45.439Z","severity":{"score":7.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["pipeboard-co meta-ads-mcp"],"affected":[{"vendor":"pipeboard-co","product":"meta-ads-mcp","versions":[{"version":"< 1.0.115","status":"affected"}]}],"references":["https://github.com/pipeboard-co/meta-ads-mcp/security/advisories/GHSA-2v2f-mvfg-ph56","https://github.com/pipeboard-co/meta-ads-mcp/pull/137","https://github.com/pipeboard-co/meta-ads-mcp/commit/95e852793b7ff8604a8132e85d5facd08c91a36e","https://github.com/pipeboard-co/meta-ads-mcp/releases/tag/1.0.115"],"weaknesses":["CWE-287"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54547.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54547","state":"PUBLISHED","datePublished":"2026-09-15T17:17:17.216Z","dateUpdated":"2026-09-17T16:23:45.439Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-15T19:04:14.456Z"},"containers":{"cna":{"title":"Meta Ads MCP: X-Pipeboard-Token Header Auth Bypass Reuses Operator Meta Token","descriptions":[{"lang":"en","value":"Meta Ads MCP is a Model Context Protocol (MCP) server that lets AI assistants run Meta Ads. Prior to version 1.0.115, AuthInjectionMiddleware in meta_ads_mcp/core/http_auth_integration.py rejects HTTP MCP requests only when both auth_token and pipeboard_token are absent, while extract_token_from_headers() does not recognize X-Pipeboard-Token as a primary credential. A network caller using the streamable-http transport can therefore send any X-Pipeboard-Token value, pass the guard without establishing authentication context, and cause get_auth_token() to fall back to the server operator's META_ACCESS_TOKEN. Subsequent MCP tools execute with the operator's Meta credentials and can read or modify the operator's Meta Ads data. Deployments using the default stdio transport or without META_ACCESS_TOKEN are not affected. This issue is fixed in version 1.0.115."}],"affected":[{"vendor":"pipeboard-co","product":"meta-ads-mcp","versions":[{"version":"< 1.0.115","status":"affected"}]}],"references":[{"url":"https://github.com/pipeboard-co/meta-ads-mcp/security/advisories/GHSA-2v2f-mvfg-ph56","name":"https://github.com/pipeboard-co/meta-ads-mcp/security/advisories/GHSA-2v2f-mvfg-ph56","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/pipeboard-co/meta-ads-mcp/pull/137","name":"https://github.com/pipeboard-co/meta-ads-mcp/pull/137","tags":["x_refsource_MISC"]},{"url":"https://github.com/pipeboard-co/meta-ads-mcp/commit/95e852793b7ff8604a8132e85d5facd08c91a36e","name":"https://github.com/pipeboard-co/meta-ads-mcp/commit/95e852793b7ff8604a8132e85d5facd08c91a36e","tags":["x_refsource_MISC"]},{"url":"https://github.com/pipeboard-co/meta-ads-mcp/releases/tag/1.0.115","name":"https://github.com/pipeboard-co/meta-ads-mcp/releases/tag/1.0.115","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-15T17:17:17.216Z"},"source":{"advisory":"GHSA-2v2f-mvfg-ph56","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/pipeboard-co/meta-ads-mcp/security/advisories/GHSA-2v2f-mvfg-ph56","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-17T16:23:11.846498Z","id":"CVE-2026-54547","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-17T16:23:45.439Z"}}]}}}