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CVE-2026-18320

Quick assessment

Affected
Readwise Reader
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Readwise Reader 的 Android 版本中，sanitize-html 配置由于使用了通配符属性规则，允许在 SVG 和 PATH 元素上保留所有属性。该配置未能移除具备脚本执行能力的属性（如事件处理程序属性，例如 'onload'、'onerror'）。攻击者可以提交包含恶意 SVG 内容的文档，该文档在通过sanitize-html 处理后仍保留可执行脚本的属性，并在 Reader 的 WebView 中渲染时执行脚本，从而导致客户端侧的跨站脚本攻击（XSS）。

AI Predicted 8.1 Difficulty: Easy EPSS 0.16% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
Readwise Reader 8.7.2< 8.10.1 affected
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I. Basic Information for CVE-2026-18320

Vulnerability Information
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Vulnerability Title
CVE-2026-18320
Source: CVE Program / CVE List V5
Vulnerability Description
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).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Readwise Reader 8.7.2 ~ 8.10.1 -

II. Public POCs for CVE-2026-18320

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III. Intelligence Information for CVE-2026-18320

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Vendor Advisories for CVE-2026-18320 (1)

Same Patch Batch · Readwise · 2026-09-25 · 3 CVEs total

CVE-2026-18311 CVE-2026-18311
CVE-2026-18312 CVE-2026-18312

IV. Related Vulnerabilities

Same product: Reader
Same vendor: Readwise

V. Comments for CVE-2026-18320

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