# CVE-2026-90827: GPAC MP4Box use-after-free in gf_node_deactivate_ex

Source: https://junglewise.ai/threats/cve-2026-90827-gpac-mp4box-use-after-free-in-gf-node-deactivate-ex  
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-2026-90827 · Severity: low · CVSS 3.3 · Published 2026-09-14

GPAC is an open-source multimedia framework used for video streaming and transcoding. A use-after-free vulnerability in the MP4Box component (which processes multimedia files) could allow a local attacker to crash the application or potentially execute code by providing a specially crafted media file.

Technologies: [Gpac MP4Box](https://junglewise.ai/threats/technologies/mp4box). Vendors: [Gpac](https://junglewise.ai/threats/vendors/gpac).

## Quick answers

**Is CVE-2026-90827 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90827 being exploited in the wild.

**How severe is CVE-2026-90827?** Low severity, with a CVSS score of 3.3, published 14 September 2026.

**Which products and versions are affected?** Gpac MP4Box 26.07.0.

**Is there a fix for CVE-2026-90827?** A patch was published on 2026-07-28: Patch commit 49dee5cad329cfed310c1682703df7daa47df31a Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-90827 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-90827?** Check whether you run Gpac MP4Box 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 use-after-free vulnerability exists in the gf_node_deactivate_ex function in scenegraph/base_scenegraph.c of GPAC's MP4Box component. The vulnerability is triggered through local file processing and requires no authentication or network access. An attacker can craft a malicious multimedia file to trigger the use-after-free condition, potentially leading to denial of service or code execution. The vulnerability has been patched in commit 49dee5cad329cfed310c1682703df7daa47df31a, and users should upgrade to version abi-16.23 or later.

## Affected products

- GPAC MP4Box 26.07.0

## Timeline

- 2026-09-14: disclosed
- 2026-07-28: patched: Patch commit 49dee5cad329cfed310c1682703df7daa47df31a

## 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 MP4Box segmentation fault in dump_isom_saps](https://junglewise.ai/threats/cve-2025-55667-a-segmentation-violation-in-the-dump-isom-saps-function-mp4box)
- [GPAC MP4Box use-after-free in gf_filter_pid_get_packet](https://junglewise.ai/threats/cve-2025-55654-a-use-after-free-in-the-gf-filter-pid-get-packet-function-filter)
- [GPAC MP4Box floating point exception in gf_parse_lfrac](https://junglewise.ai/threats/cve-2025-55653-gpac-mp4box-v2-4-was-discovered-to-contain-a-floating-point)
- [GPAC MP4Box heap buffer overflow in stbl_AddSize](https://junglewise.ai/threats/cve-2025-55640-a-heap-buffer-overflow-in-the-stbl-addsize-function-isomedia-stbl)
- [GPAC MP4Box out-of-bounds read in gf_node_del](https://junglewise.ai/threats/cve-2026-90826-gpac-mp4box-out-of-bounds-read-in-gf-node-del)