Buffer overflow in Book-Readers Ebook-Speaker
CVE-2026-123199
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/book-readers/ebook-speaker/blob/4a8f457a0fd65a96463c0fa9bd0612242c08… (technical-description)
- github.com/book-readers/ebook-speaker/commit/23b5c86585d7e3c27c932b112f4e36858e… (patch)
- VulnCheck Advisory: eBook-speaker through 6.2.0 Stack-based Buffer Overflow via element name attribute (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123199?
- CVE-2026-123199 is a medium-severity vulnerability in Book-Readers Ebook-Speaker, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2026-11-05.
- How severe is CVE-2026-123199?
- Medium severity. CVSS v3 base score is 5.5 out of 10.