CVE-2026-18320: Readwise Reader

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

Readwise Reader for Android uses a sanitize-html configuration that permits all attributes on SVG and PATH elements due to a wildcard attribute rule. This configuration fails to remove script-capable attributes such as event handlers (e.g., 'onload', 'onerror'). An attacker could supply a document containing malicious SVG content that survives sanitization and executes script wher rendered in the Reader WebView, resulting in client-side cross-site scripting (XSS).

Affected products

• Readwise Reader: from 8.7.2, before 8.10.1 (fixed in 8.10.1)

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