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CVE-2026-58500

8.2 · HIGH

MCP Appium is an MCP server that provides AI assistants with tools to automate mobile app testing on Android and iOS.

Published Jul 13, 2026CWE-79EPSS 0.40%

Overview

CVE-2026-58500 is a high-severity vulnerability. It was published on July 13, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/appium/appium-mcp/commit/e222bbbd6fe2b656a320efcd143563f08061a83dGitHubgithub.com/appium/appium-mcp/security/advisories/GHSA-x975-rgx4-5fh4GitHubgithub.com/appium/appium-mcp/security/advisories/GHSA-x975-rgx4-5fh4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-58500?

CVE-2026-58500 is a high-severity vulnerability. It was published on July 13, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-58500?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-58500?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-58500?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-58500 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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