CVE-2026-119843
Gst-plugins-good: assertion failures in FLV demuxer when parsing malformed enhanced audio/video tags
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Gst-plugins-good: assertion failures in FLV demuxer when parsing malformed enhanced audio/video tags
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.
- Record
CVE-2026-119843- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-03
EUVDEUVD-2026-115733
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.
- Record
EUVD-2026-115733- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-j9j5-89xh-84jf
A flaw was found in GStreamer's gst-plugins-good package. The FLV media demuxer does not properly...
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.
- Record
GHSA-j9j5-89xh-84jf- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-03
NVD
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.
- Record
CVE-2026-119843- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-03
OSVDEBIAN-CVE-2026-119843
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.
- Record
DEBIAN-CVE-2026-119843- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-04
OSVUBUNTU-CVE-2026-119843
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.
- Record
UBUNTU-CVE-2026-119843- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
gst-plugins-good1.0Debian:12 |
All versions, plus listed versions 1.22.0-51.22.0-5+deb12u11.22.0-5+deb12u21.22.0-5+deb12u31.22.0-5+deb12u4 Show 45 moreShow less1.22.1-11.22.10-11.22.3-11.22.3-21.22.4-11.22.5-11.22.6-11.22.7-11.22.8-11.22.8-21.22.8-31.22.9-11.23.1-11.23.2-11.23.90-11.24.0-11.24.1-11.24.1-21.24.10-11.24.11-11.24.11-21.24.11-31.24.11-41.24.11-51.24.12-11.24.2-11.24.3-11.24.4-11.24.5-11.24.6-11.24.7-11.24.8-11.24.9-11.25.1-11.25.1-21.25.1-31.25.50-11.25.90-11.25.90-21.26.0-11.26.1-11.26.10-11.26.2-11.26.3-11.26.4-1 |
None known |
gst-plugins-good1.0Debian:13 |
All versions, plus listed versions 1.26.10-11.26.2-11.26.2-1+deb13u11.26.2-1+deb13u21.26.3-1 Show 28 moreShow less1.26.4-11.26.5-11.26.5-21.26.5-2+hurd.11.26.5-31.26.6-11.26.7-11.26.8-11.26.9-11.27.1-11.27.2-11.27.50-11.27.50-21.27.90-11.28.0-11.28.1-11.28.2-11.28.2-21.28.2-31.28.2-41.28.3-11.28.4-11.28.5-11.28.6-11.28.7-11.28.8-11.29.1-11.29.2-1 |
None known |
gst-plugins-good1.0Debian:14 |
before 1.28.2-1, plus listed versions 1.26.10-11.26.2-11.26.3-11.26.4-11.26.5-1 Show 14 moreShow less1.26.5-21.26.5-2+hurd.11.26.5-31.26.6-11.26.7-11.26.8-11.26.9-11.27.1-11.27.2-11.27.50-11.27.50-21.27.90-11.28.0-11.28.1-1 |
1.28.2-1 |
gst-plugins-good1.0Ubuntu:Pro:16.04:LTS |
All versions, plus listed versions 1.6.0-1ubuntu11.6.1-1ubuntu11.6.2-1ubuntu11.7.1-1ubuntu11.7.2-1ubuntu1 Show 14 moreShow less1.7.90-1ubuntu11.7.91-1ubuntu11.8.0-1ubuntu11.8.1-1ubuntu0.11.8.2-1ubuntu0.11.8.2-1ubuntu0.21.8.2-1ubuntu0.31.8.3-1ubuntu0.31.8.3-1ubuntu0.41.8.3-1ubuntu0.51.8.3-1ubuntu0.5+esm11.8.3-1ubuntu0.5+esm21.8.3-1ubuntu0.5+esm31.8.3-1ubuntu0.5+esm4 |
None known |
gst-plugins-good1.0Ubuntu:Pro:18.04:LTS |
All versions, plus listed versions 1.12.3-1ubuntu11.12.4-1ubuntu11.13.1-1ubuntu11.13.91-1ubuntu11.14.0-1ubuntu1 Show 9 moreShow less1.14.1-1ubuntu1~ubuntu18.04.11.14.4-1ubuntu1~ubuntu18.04.11.14.5-0ubuntu1~18.04.11.14.5-0ubuntu1~18.04.21.14.5-0ubuntu1~18.04.31.14.5-0ubuntu1~18.04.3+esm11.14.5-0ubuntu1~18.04.3+esm21.14.5-0ubuntu1~18.04.3+esm31.14.5-0ubuntu1~18.04.3+esm4 |
None known |
gst-plugins-good1.0Ubuntu:Pro:20.04:LTS |
All versions, plus listed versions 1.16.1-1ubuntu11.16.2-1ubuntu11.16.2-1ubuntu21.16.2-1ubuntu2.11.16.3-0ubuntu1 Show 7 moreShow less1.16.3-0ubuntu1.11.16.3-0ubuntu1.21.16.3-0ubuntu1.31.16.3-0ubuntu1.3+esm11.16.3-0ubuntu1.3+esm21.16.3-0ubuntu1.3+esm31.16.3-0ubuntu1.3+esm4 |
None known |
gst-plugins-good1.0Ubuntu:22.04:LTS |
All versions, plus listed versions 1.18.5-1ubuntu21.18.5-1ubuntu31.20.0-2ubuntu11.20.1-1ubuntu11.20.3-0ubuntu1 Show 9 moreShow less1.20.3-0ubuntu1.11.20.3-0ubuntu1.31.20.3-0ubuntu1.41.20.3-0ubuntu1.51.20.3-0ubuntu1.61.20.3-0ubuntu1.71.20.3-0ubuntu1.81.20.3-0ubuntu1.91.20.3-0ubuntu1.10 |
None known |
gst-plugins-good1.0Ubuntu:24.04:LTS |
All versions, plus listed versions 1.22.6-1ubuntu11.22.6-1ubuntu21.22.8-3ubuntu11.22.9-1ubuntu11.24.0-1ubuntu5 Show 11 moreShow less1.24.0-1ubuntu71.24.1-2ubuntu11.24.2-1ubuntu11.24.2-1ubuntu1.11.24.2-1ubuntu1.21.24.2-1ubuntu1.31.24.2-1ubuntu1.41.24.2-1ubuntu1.51.24.2-1ubuntu1.61.24.2-1ubuntu1.71.24.2-1ubuntu1.8 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| published | OSV | |
| affected, aliases, published, references | OSV | |
| facts | EUVD, NVD | |
| published | CVE List, OSV | |
| aliases, references | GitHub Advisories | |
| aliases, products | EUVD, NVD | |
| cwes, description, products, references, severity, title | CVE List | |
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-119843 is a medium vulnerability (CVSS 6.5) in Gstreamer Gst-plugins-good, published November 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.56%, the 46th percentile. Fixed in gst-plugins-good1.0 1.28.2-1.
References
access.redhat.com/security/cve/CVE-2026-119843
bugzilla.redhat.com/show_bug.cgi?id=2564182
gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11244.patch
gstreamer.freedesktop.org/security/sa-2026-0020.html
nvd.nist.gov/vuln/detail/CVE-2026-119843
github.com/advisories/GHSA-j9j5-89xh-84jf
security-tracker.debian.org/tracker/CVE-2026-119843
ubuntu.com/security/CVE-2026-119843
cve.org/CVERecord?id=CVE-2026-119843
Left out here: 27 versions. The JSON record has them.