# CVE-2026-90684: GPAC MP4Box reachable assertion in gf_node_get_field_count

Source: https://junglewise.ai/threats/cve-2026-90684-gpac-mp4box-reachable-assertion-in-gf-node-get-field-count  
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-2026-90684 · Severity: low · CVSS 2.8 · Published 2026-09-14

GPAC is a multimedia streaming and transcoding toolkit that processes video and media files. A flaw in the MP4Box component can be triggered by crafting a malicious input file, causing the application to terminate unexpectedly (assertion failure) when processing the file locally. While not a direct data breach, this denial-of-service condition disrupts media processing workflows.

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

## Quick answers

**Is CVE-2026-90684 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90684 being exploited in the wild.

**How severe is CVE-2026-90684?** Low severity, with a CVSS score of 2.8, published 14 September 2026.

**Which products and versions are affected?** Gpac up to f1219cde.

**Is there a fix for CVE-2026-90684?** A patch was published on 2026-07-28. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-90684 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-90684?** 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

This vulnerability is a reachable assertion in the gf_node_get_field_count function within scenegraph/base_scenegraph.c of the MP4Box component. The issue is triggered by local manipulation of input data—an attacker can craft a specially-formed media file that causes the assertion to fail. The vulnerability requires local file access and does not require authentication. A successful exploit results in application termination (denial of service). The issue has been patched in version abi-16.23 (commit 49dee5cad329cfed310c1682703df7daa47df31a).

## Affected products

- GPAC GPAC up to f1219cde

## Timeline

- 2026-09-14: disclosed
- 2026-07-28: patched

## References

- [https://github.com/gpac/gpac/](https://github.com/gpac/gpac/)
- [https://github.com/gpac/gpac/commit/49dee5cad329cfed310c1682703df7daa47df31a](https://github.com/gpac/gpac/commit/49dee5cad329cfed310c1682703df7daa47df31a)

## Related threats

- [GPAC type confusion in drawable_get_aspect_2d_mpeg4 and TraverseShape](https://junglewise.ai/threats/cve-2026-124031-gpac-through-26-07-0-contains-a-type-confusion-vulnerability-in)
- [GPAC type confusion in gf_sg_command_apply](https://junglewise.ai/threats/cve-2026-124030-gpac-through-26-07-0-contains-a-type-confusion-vulnerability-in)
- [GPAC out-of-bounds write in AIT parser](https://junglewise.ai/threats/cve-2026-109827-a-vulnerability-has-been-found-in-gpac-up-to-26-07-0-this)
- [GPAC use after free in MP4Box filter queue](https://junglewise.ai/threats/cve-2026-108539-a-vulnerability-was-detected-in-gpac-up-to-26-07-0-this-affects)
- [GPAC buffer overflow in DASH Client URL resolution](https://junglewise.ai/threats/cve-2026-103227-a-weakness-has-been-identified-in-gpac-up-to-26-07-0-affected-by)