CVE-2026-33144 Details
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.
A heap-based buffer overflow vulnerability has been identified in GPAC MP4Box, prior to commit 86b0e36. The issue arises in the 'gf_xml_parse_bit_sequence_bs' function within 'utils/xml_bin_custom.c', when the application processes a specially crafted NHML file containing malicious '<BS>' (BitSequence) elements. This vulnerability allows an attacker to cause an out-of-bounds write on the heap by manipulating the 'bits' attribute, leading to potential arbitrary code execution.
Users are advised to update to GPAC version 86b0e36 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/gpac/gpac/security/advisories/GHSA-3jw5-9pmw-vmfg | CISA-ADP | ExploitVendor Advisory |
| https://github.com/gpac/gpac/commit/86b0e36ea4c71402fbdaf7e13d73ba8841003e72 | [email protected] | Patch |
| https://github.com/gpac/gpac/security/advisories/GHSA-3jw5-9pmw-vmfg | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| gpac gpac | < 2026-03-17 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 14, 2026 | Initial Analysis | [email protected] |
| Mar 20, 2026 | CVE Modified | CISA-ADP |
| Mar 20, 2026 | New CVE Received | [email protected] |