CVE-2026-124030
GPAC through 26.07.0 Type Confusion via gf_sg_command_apply XMT Field-Replace
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| gpac gpac |
≥ 0; ≤ 26.07.0 (affected, custom)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.8 medium |
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 | CNA: VulnCheck |
| 3.1 / 5.5 medium |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | CNA: VulnCheck |
| 4.0 / 6.8 medium |
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 5.5 medium |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | NVD: [email protected] |
Exploit evidence
References
- https://github.com/gpac/gpac/issues/4032CNA: VulnCheck · issue-tracking
- https://github.com/gpac/gpacCNA: VulnCheck · product
- https://github.com/gpac/gpac/commit/1359c4da9329cedceeb8fcfeab6d97e0927236e1CNA: VulnCheck · patch
- https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/224/224_gf_sg_command_apply_scenegraph_commands_c_346.xmtCNA: VulnCheck · exploit
- https://github.com/gpac/gpac/blob/v26.07.0/src/scenegraph/commands.c#L321CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/gpac-through-26.07.0-type-confusion-via-gf-sg-command-apply-xmt-field-replaceCNA: VulnCheck · third-party-advisory
- http://www.openwall.com/lists/oss-security/2026/11/14/12ADP: CVE
- https://github.com/gpac/gpac[email protected]
- https://github.com/gpac/gpac/blob/v26.07.0/src/scenegraph/commands.c#L321[email protected]
- https://github.com/gpac/gpac/commit/1359c4da9329cedceeb8fcfeab6d97e0927236e1[email protected]
- https://github.com/gpac/gpac/issues/4032[email protected]
- https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/224/224_gf_sg_command_apply_scenegraph_commands_c_346.xmt[email protected]
- https://www.vulncheck.com/advisories/gpac-through-26.07.0-type-confusion-via-gf-sg-command-apply-xmt-field-replace[email protected]
For agents and automation
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