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CVE-2026-82642— Readest: unsanitized iframe srcdoc attribute in the EPUB sanitizer can lead to arbitrary code execution

Quick assessment

Affected
readest readest
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.

Readest 是一款基于 Tauri 构建的开源电子书阅读器。在 0.11.16 版本之前，EPUB 章节的 HTML 内容在 中通过 DOMPurify 进行净化，其配置仅禁用了 标签（即 ）。 由于 DOMPurify 不会解析 元素中 属性的内容，而是将其视为一个不透明的字符串属性，因此，攻击者若能确保 元素在净化过程中得以保留，便可在 中嵌入包含 标签的完整 HTML 文档，从而在浏览器渲染该 iframe 时执行脚本。 该内容 iframe 配置为 ，这意味着在其内部执行的脚本与父窗口共享源（origi

CVSS 8.8 · High
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I. Basic Information for CVE-2026-82642

Vulnerability Information
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Vulnerability Title
Readest: unsanitized iframe srcdoc attribute in the EPUB sanitizer can lead to arbitrary code execution
Source: CVE Program / CVE List V5
Vulnerability Description
Readest is an open-source e-book reader built on Tauri. In versions prior to 0.11.16, EPUB chapter HTML is sanitized with DOMPurify using a configuration that forbade only the <script> tag (FORBID_TAGS: ['script']) in apps/readest-app/src/services/transformers/sanitizer.ts. DOMPurify does not parse the contents of the srcdoc attribute on <iframe> elements, treating it as an opaque string attribute, so an attacker who can get an <iframe> element to survive sanitization can embed a complete HTML document containing a <script> tag inside srcdoc and have it execute when the browser renders the iframe. The content iframe is configured with sandbox="allow-same-origin allow-scripts", so script executing inside it shares the parent origin and can reach parent.parent.__TAURI_INTERNALS__.invoke(...), giving access to every Tauri IPC command the application is permitted to use, which escalates to arbitrary code execution. The payload can be made invisible (zero-size, transparent iframe) so the reader sees only normal book text. Version 0.11.16 hardened the sanitizer configuration by adding 'iframe', 'object' and 'embed' to FORBID_TAGS and adding 'srcdoc' to FORBID_ATTR.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
readest readest 0 ~ 0.11.16 -

II. Public POCs for CVE-2026-82642

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III. Intelligence Information for CVE-2026-82642

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Patches & Fixes for CVE-2026-82642 (2)

Vendor Advisories for CVE-2026-82642 (1)

Vendor Pages for CVE-2026-82642 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2026-82642

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