{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/fastly-mcp/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":7.3,"id":"CVE-2026-7220"}],"_cs_exploited":false,"_cs_products":["FastlyMCP"],"_cs_severities":["high"],"_cs_tags":["command-injection","cve-2026-7220","fastly-mcp"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA command injection vulnerability, identified as CVE-2026-7220, has been discovered in jackwrichards FastlyMCP up to commit 6f3d0b0e654fc51076badc7fa16c03c461f95620. The vulnerability resides within the \u003ccode\u003efastly-mcp.mjs\u003c/code\u003e file of the \u003ccode\u003efastly_cli Tool\u003c/code\u003e component. Successful exploitation allows a remote attacker to inject and execute arbitrary operating system commands by manipulating the \u003ccode\u003ecommand\u003c/code\u003e argument. The exploit is publicly known and actively usable. Given FastlyMCP\u0026rsquo;s rolling release model, specific affected versions are unavailable, increasing the difficulty of patching. This vulnerability poses a significant risk as it can lead to complete system compromise.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a vulnerable instance of FastlyMCP running a version up to commit 6f3d0b0e654fc51076badc7fa16c03c461f95620.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP request targeting the \u003ccode\u003efastly-mcp.mjs\u003c/code\u003e file.\u003c/li\u003e\n\u003cli\u003eThe malicious request includes a manipulated \u003ccode\u003ecommand\u003c/code\u003e argument containing OS command injection payloads.\u003c/li\u003e\n\u003cli\u003eThe FastlyMCP application processes the request, passing the attacker-controlled \u003ccode\u003ecommand\u003c/code\u003e argument to an underlying OS command execution function without proper sanitization.\u003c/li\u003e\n\u003cli\u003eThe injected OS command is executed by the server with the privileges of the FastlyMCP application.\u003c/li\u003e\n\u003cli\u003eThe attacker gains arbitrary code execution on the server, enabling further malicious activities.\u003c/li\u003e\n\u003cli\u003eThe attacker may then establish persistence via web shells or by modifying system configurations.\u003c/li\u003e\n\u003cli\u003eUltimately, the attacker achieves complete control over the system, potentially leading to data theft, service disruption, or further lateral movement within the network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-7220 allows attackers to execute arbitrary OS commands on the affected system. This can lead to full system compromise, potentially resulting in data breaches, service disruption, and lateral movement to other systems within the network. The lack of specific versioning information due to the rolling release model makes identifying and patching vulnerable instances challenging, potentially increasing the number of victims.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor web server logs for suspicious requests targeting \u003ccode\u003efastly-mcp.mjs\u003c/code\u003e with unusual parameters in the query string to detect potential exploitation attempts (see the Sigma rule \u003ccode\u003eDetect FastlyMCP Command Injection Attempt\u003c/code\u003e).\u003c/li\u003e\n\u003cli\u003eImplement input validation and sanitization for the \u003ccode\u003ecommand\u003c/code\u003e argument in \u003ccode\u003efastly-mcp.mjs\u003c/code\u003e to prevent command injection, though patching is preferable.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect Suspicious Process Execution via FastlyMCP\u003c/code\u003e to identify potential malicious process execution originating from FastlyMCP.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-02T12:00:00Z","date_published":"2024-01-02T12:00:00Z","id":"/briefs/2024-01-02-fastly-mcp-command-injection/","summary":"A command injection vulnerability (CVE-2026-7220) exists in jackwrichards FastlyMCP allowing remote attackers to execute arbitrary OS commands by manipulating the command argument in the fastly-mcp.mjs file.","title":"FastlyMCP Command Injection Vulnerability (CVE-2026-7220)","url":"https://feed.craftedsignal.io/briefs/2024-01-02-fastly-mcp-command-injection/"}],"language":"en","title":"CraftedSignal Threat Feed — Fastly-Mcp","version":"https://jsonfeed.org/version/1.1"}