Buffer Validation Flaw in GStreamer’s FLV Media Demuxer
CVE-2026-119843

6.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
3 November 2026

What is CVE-2026-119843?

A flaw exists in GStreamer’s gst-plugins-good package where the FLV media demuxer inadequately validates buffer sizes and data availability when handling enhanced audio and video tags in malformed or truncated FLV streams. An attacker could exploit this vulnerability by supplying a specially crafted FLV media file. When this file is opened or streamed by applications relying on GStreamer, it may lead to assertion failures or process crashes, ultimately resulting in denial of service.

Affected Version(s)

gst-plugins-good 0 < 1.28.2

gst-plugins-good 1.28.2

References

https://access.redhat.com/security/cve/CVE-2026-119843
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2564182
issue-trackingx_refsource_REDHAT
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merg...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.