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CVE-2026-54549 is a server-side request forgery vulnerability in meta-ads-mcp affecting versions prior to 1.0.115. The flaw is present in the upload_ad_image functionality, which fetches attacker-controlled image_url values before meaningful credential validation occurs. When the server is deployed with the supported streamable-http transport, this behavior allows a remote requester to induce the application to make arbitrary outbound HTTP requests to attacker-selected destinations, including localhost, private internal address space, cloud metadata services, and targets reached through redirect chains. The issue stems from insufficient restriction and validation of server-initiated requests to user-supplied URLs.
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