---
id: "CVE-2025-55667"
kind: "vulnerability"
aliases: ["CVE-2025-55667"]
title: "GPAC MP4Box: crafted MP4 file crashes the tool with a segfault"
severity: "medium"
cvss: 5.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["gpac", "media-processing", "mp4box", "package", "self-hosted"]
not_affected_if: ["mp4box-not-used", "no-untrusted-mp4-input"]
published_at: "2026-10-19T18:16:58+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T04:12:46+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-55667", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# GPAC MP4Box: crafted MP4 file crashes the tool with a segfault

A crafted MP4 file makes the dump_isom_saps routine in GPAC's MP4Box tool hit a segmentation violation and crash. An attacker can use it to cause a denial of service against anything that runs MP4Box on untrusted files.

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

## How to check

- Run `MP4Box -version` and compare against the build in the advisory: `v2.5-DEV-rev1672-gc9a31d0e1-master` is the affected development revision.
- Check whether any pipeline runs `MP4Box -info` or dump options on uploaded media.

## Fix

- unknown: the sources do not name a fixed revision; rebuild GPAC from a newer upstream commit or move to a stable release once one includes the fix.

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2025-55667

## From the sources

A segmentation violation in the dump_isom_saps function (/mp4box/filedump.c) of GPAC MP4Box v2.5-DEV-rev1672-gc9a31d0e1-masterallows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.

---

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