---
id: CVE-2026-18311
title: >-
  Readwise Reader for Android contains a cross-site scripting vulnerability due
  to missing HTML sanitization in its processing of imported document metadata
summary: >-
  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
  WebVie…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
  - CWE-116
vendor: Readwise
product: Reader
affected:
  - Reader >= 8.7.2 <= 8.10.1
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T17:17:07.657'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18311'
references:
  - url: 'https://kb.cert.org/vuls/id/699627'
    label: cret@cert.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-25T16:58:10.634438Z'
ingestedAt: '2026-09-25T17:13:14.011Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.