CVE-2026-33144

HighCVSS 7.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
gpac	gpac	< 86b0e36ea4c71402fbdaf7e13d73ba8841003e72

References

https://github.com/gpac/gpac/commit/86b0e36ea4c71402fbdaf7e13d73ba8841003e72Patch
https://github.com/gpac/gpac/security/advisories/GHSA-3jw5-9pmw-vmfgExploit, Vendor Advisory
https://github.com/gpac/gpac/security/advisories/GHSA-3jw5-9pmw-vmfgExploit, Vendor Advisory

Timeline

Published: Mar 20, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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