What is CVE-2026-121259?

CVE-2026-121259 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-11-03.

How severe is CVE-2026-121259?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Integer overflow in Red Hat Enterprise Linux 10

CVE-2026-121259

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.

Vulnerability class: Integer Overflow

Published 2026-11-03 · last modified 2026-11-03.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

access.redhat.com/security/cve/CVE-2026-121259 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)
gstreamer.freedesktop.org/releases/1.28/
gstreamer.freedesktop.org/security/sa-2026-0015.html

Frequently asked questions

What is CVE-2026-121259?: CVE-2026-121259 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-11-03.
How severe is CVE-2026-121259?: Medium severity. CVSS v3 base score is 6.5 out of 10.