CVE-2026-124030
GPAC through 26.07.0 Type Confusion via gf_sg_command_apply XMT Field-Replace
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
GPAC through 26.07.0 contains a type confusion vulnerability in gf_sg_command_apply() in src/scenegraph/commands.c that fails to verify BIFS field-replace command types match target node fields. Attackers can supply a crafted XMT file opened with MP4Box, such as via chapter import, causing gf_sg_vrml_field_clone() to memcpy from invalid pointers and crash.
| CWE | CWE-843 |
| Vendor | gpac |
| Product | gpac |
| Published | Nov 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
gpac / gpac
0 ≤ 26.07.0
References
github.com: https://github.com/gpac/gpac/issues/4032 github.com: https://github.com/gpac/gpac github.com: https://github.com/gpac/gpac/commit/1359c4da9329cedceeb8fcfeab6d97e0927236e1 github.com: https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/224/224_gf_sg_command_apply_scenegraph_commands_c_346.xmt github.com: https://github.com/gpac/gpac/blob/v26.07.0/src/scenegraph/commands.c#L321 vulncheck.com: https://www.vulncheck.com/advisories/gpac-through-26.07.0-type-confusion-via-gf-sg-command-apply-xmt-field-replace
Credits
Alexander A. Shvedov (sigdevel)