# CVE-2026-90683: GPAC gf_node_unregister reachable assertion in MP4Box

Source: https://junglewise.ai/threats/cve-2026-90683-gpac-gf-node-unregister-reachable-assertion-in-mp4box  
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-2026-90683 · Severity: low · CVSS 3.3 · Published 2026-09-14

GPAC is multimedia software used for video streaming and transcoding. MP4Box is its utility for processing media files. A flaw in the gf_node_unregister function can trigger an assertion failure when processing malformed input, crashing the application. This requires local access and could disrupt video processing workflows.

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

## Quick answers

**Is CVE-2026-90683 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90683 being exploited in the wild.

**How severe is CVE-2026-90683?** Low severity, with a CVSS score of 3.3, published 14 September 2026.

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

**Is there a fix for CVE-2026-90683?** A patch was published on 2026-07-28: patch commit 49dee5cad329cfed310c1682703df7daa47df31a; fixed in version abi-16.23 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-90683 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-90683?** 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 is a reachable assertion vulnerability in the gf_node_unregister function within scenegraph/base_scenegraph.c of GPAC's MP4Box component. The vulnerability is triggered by manipulating input data that causes an assertion to fail, resulting in denial of service via application crash. Attack requires local system access and the ability to provide crafted input to the MP4Box utility. The patch is available in commit 49dee5cad329cfed310c1682703df7daa47df31a and shipping with GPAC version abi-16.23 or later.

## Affected products

- GPAC GPAC up to f1219cde

## Timeline

- 2026-09-14: disclosed
- 2026-07-28: patched: patch commit 49dee5cad329cfed310c1682703df7daa47df31a; fixed in version abi-16.23

## 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)

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