Quick answers
- Is CVE-2026-90578 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-90578 being exploited in the wild.
- How severe is CVE-2026-90578?
- Medium severity, with a CVSS score of 5.3, published 13 September 2026.
- Which products and versions are affected?
- Gpac MP4Box up to f1219cde.
- Is there a fix for CVE-2026-90578?
- A patch was published on 2026-07-28: commit 49dee5cad329cfed310c1682703df7daa47df31a Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-90578 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-90578?
- 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
The vulnerability is a use-after-free flaw in the gf_list_count function located in utils/list.c of the MP4Box component. The attack vector is local execution only, meaning an attacker must have access to the system running MP4Box. The vulnerability can be triggered by providing a specially crafted input that manipulates list structures, leading to access of freed memory. A patch is available in commit 49dee5cad329cfed310c1682703df7daa47df31a and upgrading to version abi-16.23 or later resolves the issue.
Affected products
- GPAC MP4Box up to f1219cde
Timeline
- 2026-09-13: disclosed
- 2026-07-28: patched: commit 49dee5cad329cfed310c1682703df7daa47df31a