CVE-2026-43910
Received Received - Intake

Remote Code Execution in Appium Java Client

Publication date: 2026-07-28

Last updated on: 2026-07-28

Assigner: GitHub, Inc.

Description
Appium Java Client is the Java language binding for writing Appium tests that conform to the W3C WebDriver protocol. From 8.2.1 until 10.1.1, when directConnect(true) is enabled, AppiumCommandExecutor.setDirectConnect() reads the directConnectHost, directConnectPort, and directConnectPath fields from the server's NEW_SESSION response and rebuilds the client's server URL from them, validating only that the protocol is https, with no host allowlist or IP validation; a rogue or compromised server can therefore redirect all subsequent session traffic to an arbitrary destination, enabling full interception of session traffic and a server-side request forgery pivot to internal hosts, including cloud metadata (IMDS) credential theft. This vulnerability is fixed in 10.1.1.

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Meta Information

Published
2026-07-28
Last Modified
2026-07-28
Generated
2026-07-28
AI Q&A
2026-07-28
EPSS Evaluated
N/A
NVD
CVE-2026-43910
EUVD
EUVD-2026-49879

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
appium java_client to 10.1.1 (inc)
appium java_client From 8.2.1 (inc) to 10.1.1 (exc)
appium java_client to 10.1.1 (exc)
appium java_client 10.1.1

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
CWE-441 The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.

Attack-Flow Graph

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Executive Summary

CVE-2026-43910 is a Server-Side Request Forgery (SSRF) vulnerability in the Appium Java Client library versions 8.2.1 to 10.1.0. When the directConnect(true) option is enabled, the client accepts directConnectHost, directConnectPort, and directConnectPath values from the server's NEW_SESSION response without validating the host or port. This allows an attacker to redirect all session traffic to an arbitrary destination, enabling interception of traffic and potential theft of cloud metadata credentials.

Detection Guidance

To detect this vulnerability, check if your Appium Java Client version is between 8.2.1 and 10.1.0. Inspect network traffic for unexpected redirections to internal hosts or cloud metadata endpoints during session creation. Monitor logs for directConnectHost, directConnectPort, or directConnectPath values in NEW_SESSION responses that point to suspicious destinations like loopback or RFC-1918 addresses.

Impact Analysis

This vulnerability allows an attacker to redirect your Appium session traffic to a malicious server. This could lead to full interception of your session data, unauthorized access to internal systems, or theft of sensitive information like cloud metadata credentials. Attackers could also pivot to internal hosts, including loopback or link-local addresses.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection principles and HIPAA's security requirements for protected health information. Non-compliance may result in legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Upgrade to Appium Java Client version 10.1.1 or later immediately. Disable the directConnect(true) option if not required. Implement network-level controls to block outbound connections to loopback, link-local, or RFC-1918 addresses from Appium clients. Review server configurations to ensure no malicious directConnect values are injected in NEW_SESSION responses.

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