{"id":"CVE-2026-58500","sourceIdentifier":"security-advisories@github.com","published":"2026-07-13T22:16:48.677","lastModified":"2026-10-24T22:10:00.210","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"MCP Appium is an MCP server that provides AI assistants with tools to automate mobile app testing on Android and iOS. In versions prior to 1.85.10, the createLocatorGeneratorUI function interpolates attacker-controlled element attributes — text, content-desc, resource-id, and locator selector values — directly into an HTML template literal without any HTML or JavaScript context escaping. An attacker who controls the UI of the app under test can inject arbitrary HTML and JavaScript into the MCP UI resource returned by the generate_locators tool. When a victim's MCP client renders this resource, the injected script executes and can invoke arbitrary MCP tools via window.parent.postMessage, leading to unauthorized MCP tool execution such as taking screenshots, reading page source, or any other registered capability. This issue has been fixed in version 1.85.10."},{"lang":"es","value":"MCP Appium es un servidor MCP que proporciona a los asistentes de IA herramientas para automatizar las pruebas de aplicaciones móviles en Android e iOS. En versiones anteriores a la 1.85.10, la función createLocatorGeneratorUI interpola atributos de elementos controlados por el atacante - texto, content-desc, resource-id y valores de selector de localizador - directamente en un literal de plantilla HTML sin ningún escape de contexto HTML o JavaScript. Un atacante que controla la interfaz de usuario de la aplicación bajo prueba puede inyectar HTML y JavaScript arbitrarios en el recurso de interfaz de usuario de MCP devuelto por la herramienta generate_locators. Cuando el cliente MCP de una víctima renderiza este recurso, el script inyectado se ejecuta y puede invocar herramientas MCP arbitrarias a través de window.parent.postMessage, lo que lleva a la ejecución no autorizada de herramientas MCP como tomar capturas de pantalla, leer el código fuente de la página o cualquier otra capacidad registrada. Este problema ha sido solucionado en la versión 1.85.10."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"appium","product":"appium-mcp","versions":[{"version":"< 1.85.10","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":4.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-14T14:24:41.518699Z","id":"CVE-2026-58500","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-79"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:appium:appium-mcp:*:*:*:*:*:node.js:*:*","versionEndIncluding":"1.85.9","matchCriteriaId":"30DD72EE-163E-401A-BEED-DE16E35211F6"}]}]}],"references":[{"url":"https://github.com/appium/appium-mcp/commit/e222bbbd6fe2b656a320efcd143563f08061a83d","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/appium/appium-mcp/security/advisories/GHSA-x975-rgx4-5fh4","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]},{"url":"https://github.com/appium/appium-mcp/security/advisories/GHSA-x975-rgx4-5fh4","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Vendor Advisory"]}]}