CVE-2026-33144

Name of the Vulnerable Software and Affected Versions GPAC versions prior to commit 86b0e36

Description GPAC is an open-source multimedia framework. A heap-based buffer overflow (write) issue exists in GPAC MP4Box within the gf xml parse bit sequence bs function in utils/xml bin custom.c when processing a crafted NHML file containing malicious (BitSequence) elements. An attacker can exploit this by providing a specially crafted NHML file, causing an out-of-bounds write on the heap.

Recommendations Update GPAC to commit 86b0e36 or later.