# CVE-2026-90792: GPAC MP4Box null pointer dereference in gf_node_list_get_child

Source: https://junglewise.ai/threats/cve-2026-90792-gpac-mp4box-null-pointer-dereference-in-gf-node-list-get-child  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-14. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-90792 · Severity: medium · CVSS 4.3 · Published 2026-09-14

GPAC is a multimedia framework used for video streaming, transcoding, and packaging. MP4Box, a component within GPAC, is vulnerable to a null pointer dereference when processing malformed BIFS scene files. An attacker can craft a malicious scene file to crash MP4Box during import, causing a denial of service to any service or application that processes untrusted media files.

Technologies: [Gpac](https://junglewise.ai/threats/technologies/gpac). Vendors: [Gpac](https://junglewise.ai/threats/vendors/gpac).

## Quick answers

**Is CVE-2026-90792 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90792 being exploited in the wild.

**How severe is CVE-2026-90792?** Medium severity, with a CVSS score of 4.3, published 14 September 2026.

**Which products and versions are affected?** Gpac up to f1219cde; fixed in abi-16.23.

**Is there a fix for CVE-2026-90792?** A patch was published on 2026-09-14: Fix available in commit afca1f1181668d85941d51ed1adf647807d5d975; upgrade to version abi-16.23 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-90792 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-90792?** Check whether you run Gpac at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a null pointer dereference (CWE-476) in the gf_node_list_get_child() function within scenegraph/base_scenegraph.c. The root cause lies in gf_bt_parse_bifs_command() in scene_manager/loader_bt.c, which treats a target field as a child-node list without validating that the field is actually the "children" field. This causes an invalid pointer to be dereferenced, leading to a segmentation fault near address 0x8. The attack is remotely exploitable via a crafted BT/BIFS scene file supplied to MP4Box (typically via the -add command-line option). The fix, commit afca1f1181668d85941d51ed1adf647807d5d975, validates the target field name before dereferencing it and rejects invalid commands. Upgrading to version abi-16.23 or later resolves the issue.

## Affected products

- GPAC GPAC up to f1219cde; fixed in abi-16.23

## Timeline

- 2026-09-14: disclosed: CVE-2026-90792 published
- 2026-09-14: patched: Fix available in commit afca1f1181668d85941d51ed1adf647807d5d975; upgrade to version abi-16.23

## References

- [https://github.com/Ech06/CVE_submit/blob/main/gpac_3802.md](https://github.com/Ech06/CVE_submit/blob/main/gpac_3802.md)
- [https://github.com/gpac/gpac/](https://github.com/gpac/gpac/)

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