CVE-2026-121259

Medium CVSS 6.5

Published 2026-11-03 · last changed 2026-11-05

The fix

We hold no Microsoft remediation data for CVE-2026-121259, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

NVD record for CVE-2026-121259

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H