# CVE-2026-90793: GPAC MP4Box heap use-after-free in gf_node_get_name

Source: https://junglewise.ai/threats/cve-2026-90793-gpac-mp4box-heap-use-after-free-in-gf-node-get-name  
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-2026-90793 · Severity: medium · CVSS 5.4 · Published 2026-09-14

GPAC is a multimedia framework used for video processing and transcoding. MP4Box is its command-line tool for manipulating media files. A flaw in DEF/USE scene graph parsing can cause a crash or potential memory corruption when processing malformed scene files, affecting media import workflows that handle untrusted content.

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

## Quick answers

**Is CVE-2026-90793 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90793 being exploited in the wild.

**How severe is CVE-2026-90793?** Medium severity, with a CVSS score of 5.4, published 14 September 2026.

**Which products and versions are affected?** Gpac up to commit f1219cde; fixed in abi-16.23 (commit 9eb40df4).

**Is there a fix for CVE-2026-90793?** A patch was published on 2026-07-27: Fix commit 9eb40df4448b88d6a6ce3454657c06f47eff0b24 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-90793 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-90793?** 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 heap use-after-free vulnerability exists in the gf_node_get_name function within GPAC's base_scenegraph.c. The root cause is in the error-handling path of gf_bt_sf_node(): when node parsing fails, the partially constructed node is freed and unregistered, but the stale pointer remains in the parser's def_nodes list. Subsequent DEF/USE resolution calls gf_node_get_name() on the dangling pointer, triggering a use-after-free read. The attack vector is remote (processing untrusted BT scene files via MP4Box -add). The vulnerability can cause denial-of-service via crash, and potentially more severe memory corruption. The fix (commit 9eb40df4) removes the failed node from the def_nodes list before freeing it.

## Affected products

- GPAC GPAC up to commit f1219cde; fixed in abi-16.23 (commit 9eb40df4)

## Timeline

- 2026-09-14: disclosed: Published in NVD
- 2026-07-27: patched: Fix commit 9eb40df4448b88d6a6ce3454657c06f47eff0b24

## References

- [https://github.com/Ech06/CVE_submit/blob/main/gpac_3803.md](https://github.com/Ech06/CVE_submit/blob/main/gpac_3803.md)
- [https://github.com/gpac/gpac/](https://github.com/gpac/gpac/)

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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)