CVE-2026-124030mediumCWE-843

CVE-2026-124030: medium-severity vulnerability in gpac

GPAC through 26.07.0 Type Confusion via gf_sg_command_apply XMT Field-Replace

Published

Follow this CVE+ Monitor GPAC

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

30Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 6.8
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
gpac · gpac
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — gpac

In the same product, most dangerous first.

CVE-2026-27821HIGHGPAC NHML Demuxer (dmx_nhml.c) Vulnerable to Stack Buffer OverflowEPSS 0.3%CVE-2026-33144MEDIUMGPAC MP4Box Heap Buffer Overflow Write in gf_xml_parse_bit_sequence_bs (NHML BS Parsing)EPSS 0.2%CVE-2026-124031MEDIUMGPAC through 26.07.0 Type Confusion via drawable_get_aspect_2d_mpeg4EPSS —