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Fencer Intel
medium 6.5

CVE-2026-119843 json

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

published 6d ago modified 6d ago also EUVD-2026-115733

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

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.

Patch / fix

  • GStreamer project gst-plugins-good 1.28.2
  • gst-plugins-good1.0 Debian 14 1.28.2-1

debian advisories DEBIAN-CVE-2026-119843

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-119843 updated cvss 6.5

gst-plugins-good: gst-plugins-good: assertion failures in FLV demuxer when parsing malformed enhanced audio/video tags

  • Red Hat Enterprise Linux 7 gstreamer1-plugins-good Red Hat Enterprise Linux 8 gstreamer1-plugins-good, gstreamer1-plugins-good-gtk Red Hat Enterprise Linux 9 gstreamer1-plugins-good, gstreamer1-plugins-good-gtk Red Hat Enterprise Linux 10 gstreamer1-plugins-good
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6d ago

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • GStreamer project gst-plugins-good

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.