---
id: "CVE-2025-71469"
page: "https://infrastack.ai/live/CVE-2025-71469"
kind: "vulnerability"
aliases: ["CVE-2025-71469"]
title: "GPAC: crafted XMT file crashes MP4Box and other GPAC tools"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["gpac", "media-processing", "mp4box", "package"]
not_affected_if: ["gpac-26.02.0-or-later", "no-untrusted-xmt-input"]
published_at: "2026-11-15T16:16:56+00:00"
first_seen_at: "2026-11-15T16:35:37+00:00"
updated_at: "2026-11-15T16:37:11+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71469", "first_seen_at": "2026-11-15T16:35:37+00:00"}]
exploit_sources: []
---

# GPAC: crafted XMT file crashes MP4Box and other GPAC tools

Link for people: https://infrastack.ai/live/CVE-2025-71469 (this .md is for agents)

GPAC before 26.02.0 has a type confusion flaw in ctxload_process() that accepts a non-object descriptor without checking its tag. A crafted XMT file with a URL-bearing descriptor crashes MP4Box or other GPAC-based applications, causing denial of service.

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

## How to check

- Check the installed GPAC version with `MP4Box -version` and compare it to `26.02.0`.
- Find out whether anything processes untrusted XMT files with MP4Box or GPAC.

## Fix

- GPAC: upgrade to `26.02.0` or later.

## Timeline

- 2026-11-15T16:35:37+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2025-71469

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/gpac-before-26.02.0-type-confusion-dos-via-xmt-bt-scene-loader
- [fix] Patch: github.com https://github.com/gpac/gpac/commit/62714f27c64a3d1eb7e880f9eed2d38673cb43ce

## From the sources

GPAC before 26.02.0 contains a type confusion vulnerability in ctxload_process() that passes non-object descriptors to ODS_SetupOD() without checking the descriptor tag. Attackers can supply a crafted XMT file with a URL-bearing descriptor that crashes MP4Box or other GPAC-based applications in gf_scene_ns_connect_object(), causing denial of service.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_