CVE-2026-33144
Medium · 5.8CVSS
5.8
EPSS
0.2%
Published
Mar 20, 2026
CISA due date
—
The record
GPAC is an open-source multimedia framework. Prior to commit 86b0e36, a heap-based buffer overflow (write) vulnerability was discovered in GPAC MP4Box. The vulnerability exists in the gf_xml_parse_bit_sequence_bs function in utils/xml_bin_custom.c when processing a crafted NHML file containing malicious <BS> (BitSequence) elements. An attacker can exploit this by providing a specially crafted NHML file, causing an out-of-bounds write on the heap. This issue has been via commit 86b0e36.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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