CVE-2025-54874: Uclouvain Openjpeg

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

OpenJPEG is an open-source JPEG 2000 codec. In OpenJPEG from 2.5.1 through 2.5.3, a call to opj_jp2_read_header may lead to OOB heap memory write when the data stream p_stream is too short and p_image is not initialized.

Affected products

• Uclouvain Openjpeg: up to and including 2.5.3

Published 2025-08-05. Last modified 2026-06-17.