CVE-2021-32439: Gpac

High severity, CVSS 7.8. EPSS: 1.3% chance of exploitation in the next 30 days.

Buffer overflow in the stbl_AppendSize function in MP4Box in GPAC 1.0.1 allows attackers to cause a denial of service or execute arbitrary code via a crafted file.

Affected products

• Gpac Gpac: version 1.0.1 only

Published 2021-08-11. Last modified 2026-06-17.