XSS in Appium
CVE-2026-58191
Appium is a cross-platform automation framework for all kinds of apps, built on top of the W3C WebDriver protocol. Prior to 10.7.0, Appium's base-driver unconditionally mounts the /test/guinea-pig, /test/guinea-pig-scrollable, and /test/guinea-pig-app-banner routes, and compileLodashTemplate reflects the throwError query parameter, comments POST field, and User-Agent request header into HTML without escaping, allowing reflected cross-site scripting and arbitrary JavaScript execution on the server origin. This issue is fixed in version 10.7.0.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.003 (16.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Appium — versions < 10.7.0
- Appium Appium\/base-driver
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-58191?
- CVE-2026-58191 is a medium-severity vulnerability in Appium, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-07-08.
- How severe is CVE-2026-58191?
- Medium severity. CVSS v3 base score is 6.5 out of 10.