CVE-2026-18311: Readwise Reader

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Readwise Reader for Android contains a cross-site scripting vulnerability due to missing HTML sanitization in its processing of imported document metadata. Attacker-controlled fields such as the author meta tag are inserted into a WebView via innerHTML, enabling stored XSS that executes on synced devices when the malicious document is opened.

Affected products

• Readwise Reader: from 8.7.2, up to and including 8.10.1

Published 2026-09-25. Last modified 2026-09-28.