---
id: "CVE-2026-123199"
kind: "vulnerability"
aliases: ["CVE-2026-123199"]
title: "eBook-speaker: stack overflow from long attribute in EPUB or DAISY books"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["daisy", "ebook-speaker", "epub", "linux", "other"]
not_affected_if: ["untrusted-books-not-opened", "version-outside-6.1.0-6.2.0"]
published_at: "2026-11-05T19:17:18+00:00"
first_seen_at: "2026-11-05T19:40:35+00:00"
updated_at: "2026-11-05T19:43:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123199", "first_seen_at": "2026-11-05T19:40:35+00:00"}]
exploit_sources: []
---

# eBook-speaker: stack overflow from long attribute in EPUB or DAISY books

eBook-speaker 6.1.0 through 6.2.0 copies an element's name attribute into a fixed stack buffer with an unbounded strcpy in get_attributes(). A crafted EPUB or DAISY book with a name of 511 or more characters corrupts the stack and crashes the reader when opened.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed eBook-speaker version against the affected range `6.1.0` through `6.2.0`
- Look for eBook-speaker in the installed software list on the machine

## Fix

- Patch exists per the linked fix reference; the fixed version is unknown from the sources

## Timeline

- 2026-11-05T19:40:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123199

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/ebook-speaker-through-6.2.0-stack-based-buffer-overflow-via-element-name-attribute
- [fix] Patch: github.com https://github.com/book-readers/ebook-speaker/commit/23b5c86585d7e3c27c932b112f4e36858e70f210

## From the sources

eBook-speaker 6.1.0 through 6.2.0 contains a stack buffer overflow vulnerability in get_attributes() in src/common.c caused by an unbounded strcpy of an element's name attribute. Attackers can craft an EPUB or DAISY book with a name attribute of 511 or more characters to corrupt the stack and crash the reader when opened.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_