CVE-2026-124031
MEDIUM
NVD
CVSS Score
5.5
Severity
MEDIUM
Published
Nov 06, 2026
Vendor
unknown
Description
GPAC through 26.07.0 contains a type confusion vulnerability in drawable_get_aspect_2d_mpeg4() and TraverseShape() that casts a Shape's appearance node to M_Appearance without checking its node tag. Attackers can supply a crafted XMT file placing another node type, such as Conditional, in the appearance field to trigger an invalid memory read and crash MP4Box.
References
- https://github.com/gpac/gpac
- https://github.com/gpac/gpac/blob/v26.07.0/src/compositor/drawable.c#L564-L565
- https://github.com/gpac/gpac/commit/43a8329a90ae2907716b593cc3746458516c7c39
- https://github.com/gpac/gpac/issues/4030
- https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/222/222_gf_node_get_tag_compositor_texturing_c_370.xmt