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Vulnerability · Published Nov 3, 2026 · Assigned by redhat

CVE-2026-119843Gst-plugins-good: assertion failures in FLV demuxer when parsing malformed enhanced audio/video tags

Medium 6.5

In plain English

A medium-severity security flaw in gst-plugins-good from GStreamer project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.6%top 53.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in GStreamer's gst-plugins-good package. The FLV media demuxer does not properly validate buffer sizes and data availability when processing enhanced audio and video tags in malformed or truncated FLV streams. A remote attacker could exploit this vulnerability by providing a specially crafted FLV media file that, when opened or streamed by a GStreamer-based application, triggers an assertion failure or a process crash, leading to denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12gst-plugins-good1.0no fix listedDEBIAN-CVE-2026-119843
Debian:13gst-plugins-good1.0no fix listedDEBIAN-CVE-2026-119843
Debian:14gst-plugins-good1.01.28.2-1DEBIAN-CVE-2026-119843
Ubuntu:22.04:LTSgst-plugins-good1.0no fix listedUBUNTU-CVE-2026-119843
Ubuntu:24.04:LTSgst-plugins-good1.0no fix listedUBUNTU-CVE-2026-119843

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
GStreamer project gst-plugins-good 0 – before 1.28.2

Weakness: CWE-617 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References