---
id: "CVE-2026-121259"
kind: "vulnerability"
aliases: ["CVE-2026-121259"]
title: "GStreamer: crafted JPEG 2000 media can crash apps processing it"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["gst-plugins-bad", "gstreamer", "jpeg2000", "media-processing", "package"]
not_affected_if: ["no-jpeg2000-decoding", "no-untrusted-media"]
published_at: "2026-11-03T17:18:07+00:00"
first_seen_at: "2026-11-03T17:21:56+00:00"
updated_at: "2026-11-03T17:24:08+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121259", "first_seen_at": "2026-11-03T17:21:56+00:00"}]
---

# GStreamer: crafted JPEG 2000 media can crash apps processing it

The JPEG 2000 decimator in GStreamer's gst-plugins-bad plugin mishandles tile processing, causing integer overflows or division by zero. An attacker who supplies crafted JPEG 2000 media can crash any application that processes it, a denial of service.

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

## Timeline

- 2026-11-03T17:21:56+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121259

## From the sources

A flaw was found in the GStreamer JPEG 2000 decimator in gst-plugins-bad. Crafted JPEG 2000 media can cause integer overflows or division by zero during tile processing. An application that processes the malicious media may crash, resulting in a denial of service.

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