CVE-2026-18311 in Readwise

Summary

by MITRE • 09/25/2026

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.

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• Responsible: Certcc
• Reservation: 07/29/2026
• Disclosure: 09/25/2026
• Moderation: accepted
• Entry: VDB-410373
• CPE: ready
• CWE: CWE-79 (confirmed)
• CVSS: 6.1 (CISA-ADP)
• EPSS: 0.00000
• KEV: no
• Activities: very low

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-18311
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18311
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-18311/