CVE-2023-40890: Zbar Project Zbar

Critical severity, CVSS 9.8. EPSS: 1.9% chance of exploitation in the next 30 days.

A stack-based buffer overflow vulnerability exists in the lookup_sequence function of ZBar 0.23.90. Specially crafted QR codes may lead to information disclosure and/or arbitrary code execution. To trigger this vulnerability, an attacker can digitally input the malicious QR code, or prepare it to be physically scanned by the vulnerable scanner.

Affected products

Published 2023-08-29. Last modified 2026-06-17.