{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/products/p_69_branch_monkey_mcp/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":7.3,"id":"CVE-2026-7590"}],"_cs_exploited":false,"_cs_products":["p_69_branch_monkey_mcp"],"_cs_severities":["critical"],"_cs_tags":["command-injection","web-application","cve"],"_cs_type":"advisory","_cs_vendors":["eyal-gor"],"content_html":"\u003cp\u003eA critical OS command injection vulnerability, CVE-2026-7590, has been identified in the Preview Endpoint of eyal-gor\u0026rsquo;s p_69_branch_monkey_mcp. This vulnerability affects versions up to commit 69bc71874ce40050ef45fde5a435855f18af3373. A remote attacker can exploit this flaw by manipulating the \u003ccode\u003edev_script\u003c/code\u003e argument within the \u003ccode\u003ebranch_monkey_mcp/bridge_and_local_actions/routes/advanced.py\u003c/code\u003e file.  Successful exploitation allows for arbitrary command execution on the host operating system. The exploit is publicly available, increasing the risk of widespread exploitation. The vendor has been notified but has not yet responded. The lack of versioning makes it difficult to determine the exact scope of affected installations.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable instance of p_69_branch_monkey_mcp running a web server.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP request targeting the Preview Endpoint.\u003c/li\u003e\n\u003cli\u003eThe request includes a payload in the \u003ccode\u003edev_script\u003c/code\u003e argument designed to inject OS commands via the \u003ccode\u003ebranch_monkey_mcp/bridge_and_local_actions/routes/advanced.py\u003c/code\u003e file.\u003c/li\u003e\n\u003cli\u003eThe web server processes the request, passing the attacker-controlled \u003ccode\u003edev_script\u003c/code\u003e argument to a function that executes system commands without proper sanitization.\u003c/li\u003e\n\u003cli\u003eThe injected OS command is executed by the server, potentially with the privileges of the web server user. For example, an attacker could inject \u003ccode\u003els -la\u003c/code\u003e to list directory contents.\u003c/li\u003e\n\u003cli\u003eThe output of the injected command is returned to the attacker via the web server\u0026rsquo;s response, confirming successful command execution.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the initial command execution to escalate privileges, install persistent backdoors, or move laterally within the network, depending on the server\u0026rsquo;s configuration and accessible resources.\u003c/li\u003e\n\u003cli\u003eThe attacker achieves their final objective, such as data exfiltration, system compromise, or denial of service.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-7590 allows a remote attacker to execute arbitrary OS commands on the affected server. This could lead to complete system compromise, including data theft, malware installation, and denial of service. The lack of version information makes it difficult to ascertain the number of vulnerable installations, but given the publicly available exploit, widespread exploitation is possible. Organizations using p_69_branch_monkey_mcp are at high risk.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor web server logs for suspicious requests targeting the Preview Endpoint and containing potentially malicious payloads in the \u003ccode\u003edev_script\u003c/code\u003e parameter as described in the attack chain. Use the \u0026ldquo;p_69_branch_monkey_mcp_command_injection\u0026rdquo; Sigma rule.\u003c/li\u003e\n\u003cli\u003eInspect process creation events for unexpected processes spawned by the web server, indicating potential command injection. Use the \u0026ldquo;p_69_branch_monkey_mcp_unexpected_process\u0026rdquo; Sigma rule.\u003c/li\u003e\n\u003cli\u003eImplement input validation and sanitization on the \u003ccode\u003edev_script\u003c/code\u003e parameter in the \u003ccode\u003ebranch_monkey_mcp/bridge_and_local_actions/routes/advanced.py\u003c/code\u003e file to prevent command injection.\u003c/li\u003e\n\u003cli\u003eAlthough specific vulnerable versions are unavailable, immediately investigate and patch any instances of \u003ccode\u003ep_69_branch_monkey_mcp\u003c/code\u003e due to the public exploit availability.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-02T12:00:00Z","date_published":"2026-05-02T12:00:00Z","id":"/briefs/2026-05-branch-monkey-mcp-command-injection/","summary":"A remote attacker can inject OS commands by manipulating the dev_script argument in the Preview Endpoint of eyal-gor's p_69_branch_monkey_mcp (up to commit 69bc71874ce40050ef45fde5a435855f18af3373), leading to arbitrary code execution on the server.","title":"OS Command Injection Vulnerability in p_69_branch_monkey_mcp Preview Endpoint (CVE-2026-7590)","url":"https://feed.craftedsignal.io/briefs/2026-05-branch-monkey-mcp-command-injection/"}],"language":"en","title":"CraftedSignal Threat Feed — P_69_branch_monkey_mcp","version":"https://jsonfeed.org/version/1.1"}