# CVE-2026-91090: GPAC stack-based buffer overflow in scenegraph base module

Source: https://junglewise.ai/threats/cve-2026-91090-gpac-stack-based-buffer-overflow-in-scenegraph-base-module  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-91090 · Severity: low · CVSS 3.9 · Published 2026-09-15

GPAC is a multimedia framework used for video streaming and transcoding. A stack-based buffer overflow vulnerability in the scenegraph module can be triggered through specially crafted multimedia files, potentially leading to code execution or application crash on affected systems.

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

## Quick answers

**Is CVE-2026-91090 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91090 being exploited in the wild.

**How severe is CVE-2026-91090?** Low severity, with a CVSS score of 3.9, published 15 September 2026.

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

**Is there a fix for CVE-2026-91090?** A patch was published on 2026-07-27: Patch commit 9eb40df4448b88d6a6ce3454657c06f47eff0b24 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-91090 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-91090?** 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

A stack-based buffer overflow vulnerability exists in the gf_node_activate_ex function within scenegraph/base_scenegraph.c in GPAC up to commit f1219cde. The vulnerability can be exploited locally through the processing of malicious multimedia input. An attacker can trigger the overflow by supplying crafted scenegraph data, which may result in arbitrary code execution or denial of service. The vulnerability has been patched in version abi-16.23 via commit 9eb40df4448b88d6a6ce3454657c06f47eff0b24.

## Affected products

- GPAC GPAC up to f1219cde

## Timeline

- 2026-09-15: disclosed
- 2026-07-27: patched: Patch commit 9eb40df4448b88d6a6ce3454657c06f47eff0b24

## References

- [https://github.com/gpac/gpac/](https://github.com/gpac/gpac/)
- [https://github.com/gpac/gpac/commit/9eb40df4448b88d6a6ce3454657c06f47eff0b24](https://github.com/gpac/gpac/commit/9eb40df4448b88d6a6ce3454657c06f47eff0b24)

## Related threats

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- [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)