---
id: CVE-2026-82642
title: Readest is an open-source e-book reader built on Tauri
summary: >-
  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/sr…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-79
published: '2026-08-30'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82642'
references:
  - url: >-
      https://github.com/readest/readest/commit/005aa2d6157a34049bf45641c06861d606a85edb
    label: reefs@jfrog.com
  - url: 'https://github.com/readest/readest/pull/4762'
    label: reefs@jfrog.com
  - url: 'https://github.com/readest/readest/releases/tag/v0.11.16'
    label: reefs@jfrog.com
  - url: 'https://github.com/readest/readest/security/advisories/GHSA-p4x7-pf2c-xrvj'
    label: reefs@jfrog.com
tags:
  - nvd
ingestedAt: '2026-08-30T23:59:28.209Z'
epss: 0.00665
epssPercentile: 0.4969
---

## Overview

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.

## Remediation

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