---
id: "CVE-2026-125703"
page: "https://infrastack.ai/live/CVE-2026-125703"
kind: "vulnerability"
aliases: ["CVE-2026-125703"]
title: "GStreamer MXF plugin: crafted VANC data crashes apps via out-of-bounds access"
severity: "medium"
cvss: 5.5
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "gst-plugins-bad", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["gstreamer", "media-processing", "mxf", "package"]
not_affected_if: ["no-mxf-processing"]
published_at: "2026-11-10T11:16:43+00:00"
first_seen_at: "2026-11-10T11:21:35+00:00"
updated_at: "2026-11-10T11:22:05+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-125703", "first_seen_at": "2026-11-10T11:21:35+00:00"}]
exploit_sources: []
---

# GStreamer MXF plugin: crafted VANC data crashes apps via out-of-bounds access

Link for people: https://infrastack.ai/live/CVE-2026-125703 (this .md is for agents)

The GStreamer gst-plugins-bad MXF plugin does not check bounds when parsing VANC ancillary data, causing out-of-bounds reads and writes. Processing a crafted MXF file may crash the application, a denial of service.

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

## Affected

- vendor:gst-plugins-bad affected range not listed fixed no fixed version listed

## Timeline

- 2026-11-10T11:21:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-125703

## From the sources

A flaw was found in the GStreamer gst-plugins-bad MXF plugin. Insufficient bounds checks when parsing crafted VANC data can cause an out-of-bounds read in the demuxer, while an incorrect buffer size calculation when muxing multiple ancillary packets can cause an out-of-bounds write. Processing affected content may crash the application, resulting in a denial of service.

---

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