CVE-2026-123199
Received Received - Intake

Stack Buffer Overflow in eBook-speaker via EPUB/DAISY Name Attribute

Publication date: 2026-11-05

Last updated on: 2026-11-05

Assigner: VulnCheck

Description
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.

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Meta Information

Published
2026-11-05
Last Modified
2026-11-05
Generated
2026-11-06
AI Q&A
2026-11-05
EPSS Evaluated
N/A
NVD
CVE-2026-123199
EUVD
EUVD-2026-117644

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
book-readers eBook-speaker 6.1.0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-120 The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

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Executive Summary

This is a stack buffer overflow in eBook-speaker versions 6.1.0 through 6.2.0. The vulnerability occurs in the get_attributes() function in src/common.c due to an unbounded strcpy operation that copies an element's name attribute without length checks. Attackers can exploit this by creating an EPUB or DAISY book with a name attribute of 511 or more characters, causing stack corruption and crashing the reader when opened.

Detection Guidance

To detect this vulnerability, check the installed version of eBook-speaker. If it is between 6.1.0 and 6.2.0, the system is vulnerable. Run: ebook-speaker --version. Additionally, monitor for crashes when opening EPUB or DAISY files with long name attributes.

Impact Analysis

The vulnerability allows attackers to crash the eBook-speaker application by opening a maliciously crafted EPUB or DAISY file. This could lead to denial-of-service conditions, preventing users from accessing their eBooks. If exploited further, it might enable arbitrary code execution, though this is not confirmed in the provided context.

Mitigation Strategies

Update eBook-speaker to a version beyond 6.2.0. If an update is unavailable, avoid opening untrusted EPUB or DAISY files. Implement input validation for name attributes in files. Restrict file access permissions.

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