---
id: "CVE-2025-60476"
kind: "vulnerability"
aliases: ["CVE-2025-60476"]
title: "GPAC MP4Box: crafted AC4 file triggers use-after-free and crash"
severity: "low"
cvss: null
epss: 0.00176
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["gpac", "media-processing", "mp4box", "package"]
not_affected_if: ["mp4box-not-installed", "no-untrusted-media-input"]
published_at: "2026-10-21T16:17:13+00:00"
first_seen_at: "2026-10-23T21:57:28+00:00"
updated_at: "2026-10-25T05:02:05+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-60476", "first_seen_at": "2026-10-23T21:57:28+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2025-60476", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# GPAC MP4Box: crafted AC4 file triggers use-after-free and crash

GPAC MP4Box versions before 2.5 contain a heap use-after-free in the gf_odf_ac4_cfg_clean_list function in odf/descriptors.c. An attacker who supplies a crafted AC4 file can crash the tool, causing a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `MP4Box -version` and compare the reported version against `2.5`.

## Fix

- Upgrade GPAC MP4Box to `2.5` or later.

## Timeline

- 2026-10-23T21:57:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2025-60476
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2025-60476

## From the sources

A heap use-after-free in the gf_odf_ac4_cfg_clean_list function (/odf/descriptors.c) of GPAC Project/MP4Box before 2.5 allows attackers to cause a Denial of Service (DoS) via supplying a crafted AC4 file.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_