CVE-2026-124030 | BDVDB-2026-401330 Detail
gpacgpac
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: local.
Weaknesses#
- CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
References#
- https://github.com/gpac/gpac/issues/4032
- https://github.com/gpac/gpac
- https://github.com/gpac/gpac/commit/1359c4da9329cedceeb8fcfeab6d97e0927236e1
- https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/224/224_gf_sg_command_apply_scenegraph_commands_c_346.xmt
- https://github.com/gpac/gpac/blob/v26.07.0/src/scenegraph/commands.c#L321
- https://www.vulncheck.com/advisories/gpac-through-26.07.0-type-confusion-via-gf-sg-command-apply-xmt-field-replace
Exploit#
History#
- Version 1Record published in the CVE List.