CVE-2026-102566: Opennmt CTRANSLATE2

High severity, CVSS 7.8. EPSS: 0.1% chance of exploitation in the next 30 days.

CTranslate2 before 4.8.1 contains a heap-based buffer overflow in the binary model loader that fails to validate payload length against allocated buffer size. Attackers can craft malicious model files with oversized payload lengths to write past heap allocation boundaries, causing crashes or arbitrary code execution.

Affected products

• Opennmt CTRANSLATE2: before 4.8.1 (fixed in 4.8.1)

Published 2026-09-29. Last modified 2026-09-30.