CVE-2026-43910: Appium java-client Allows Network Pivot via Unvalidated directConnect Redirect in AppiumCommandExecutor

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-07-28 · updated 2026-10-24
Weakness: CWE-441

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.

Affected products

appium java-client: from 8.2.1 before 10.1.1 — fixed in 10.1.1

How to fix

Upgrade to a fixed version: appium java-client 10.1.1. Check the vendor advisory for mitigations.

References

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