Appium: Reflected XSS / arbitrary JS in @appium/base-driver /test/guinea-pig* routes — GHSA-3WGP-X9P5-C7CC

Summary

## Summary Appium's base-driver mounts the built-in `/test/guinea-pig`, `/test/guinea-pig-scrollable` and `/test/guinea-pig-app-banner` routes **unconditionally** on every server. The handler reflects the `throwError` query param, the `comments` POST field, and the `User-Agent` request header into the returned HTML via `compileLodashTemplate`, which interpolates `<%= expr %>` as `String(expr)` with **no HTML/JS…

Timeline

Published by source

2026-09-01

Risk context

• Reported severity or threat level: medium.
• Reported CVSS score: 6.5 out of 10.
• Reported EPSS value: 0.00316.
• Review exposure for the affected product or family: npm: @appium/base-driver.

Product

npm: @appium/base-driver

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-3WGP-X9P5-C7CC

Source

GitHub

Vendor

GitHub

Published by source

2026-09-01

Last source activity

2026-09-01

Additional identifiers

CVE-2026-58191

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.