CVE-2026-33144 | THREATINT

Description

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.

PUBLISHED Reserved 2026-03-17 | Published 2026-03-20 | Updated 2026-03-20 | Assigner GitHub_M

MEDIUM: 5.8CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H

Problem types

CWE-787: Out-of-bounds Write

Product status

< 86b0e36ea4c71402fbdaf7e13d73ba8841003e72

affected

References

github.com/gpac/gpac/security/advisories/GHSA-3jw5-9pmw-vmfg exploit

github.com/gpac/gpac/security/advisories/GHSA-3jw5-9pmw-vmfg

github.com/...ommit/86b0e36ea4c71402fbdaf7e13d73ba8841003e72

cve.org (CVE-2026-33144)

nvd.nist.gov (CVE-2026-33144)

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