CVE-2026-55408CWE-94

Koodo Reader: Remote code execution via malicious epub file

High · published July 7, 2026

CVSS v4.0
8.4
EPSS
0%
Percentile
15.0
In the wild
Unconfirmed
What it is

Koodo Reader is an ebook reader. In version 2.3.0 and earlier, Koodo Reader is vulnerable to remote code execution through malicious EPUB files because the open-book IPC handler enables nodeIntegrationInSubFrames and EPUB chapter content is rendered with unsanitized innerHTML. An attacker can craft an EPUB book that, when imported and opened by the victim, instantiates a hidden iframe with Node.js API access and executes arbitrary operating system commands with the victim user's privileges. This issue is fixed in version 2.3.1.

The record
Technical detail
CVSS v4.0
8.4 · HIGH
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00246 · 15.0th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-07-07T21:02Z
EPSS history
Timeline
  • 07 JUL 21:02Z
    Koodo Reader: Remote code execution via malicious epub file
    cvelistv5